Dog diarrhea stool sample negative

Diarrhea Again after all stool tests came back negative

Diarrhea Again after all stool tests came back negative. Jump to Latest Follow 1 - 9 of 9 Posts. Alycia Thank you for your responses- I'm nervous and this is my first dog I'm raising. We switched to a grain free formula and still he had diarrhea. So we put him on a fish based grain free formula and gave him RMB's in the afternoon every day Stool sample was negative, and I did a bland diet for a few days and was starting to notice more normal poops, but now after switching back to just the Solid Gold kibble, he continues to have a more solid/normal poop in the morning and then sometimes one more before the other 2-3 times he goes are diarrhea Diarrhea can be caused by many different things, some easier to diagnose than others. Simple diarrhea with no other clinical signs may not require diagnostic testing, but if diarrhea is ongoing or your pet is showing other clinical signs then baseline diagnostic testing including complete blood count (CBC), biochemistry profile, urinalysis, and fecal testing may be recommended

Several days after coming home his stools began to become watery. The clinic took a fecal sample (negative) and put him on 5 days metro (which was successful). 2 days after the metro he relapsed. The clinic put him on another 5 days metro and another fecal sample (negative but for 1 mite egg) The color of your dog's stool sample can not only indicate that something is wrong with your dog's health. Depending on the color, it's intensity and brightness, it can often hint what the problem may be. The different colors you will see include black, red, yellow, gray and green Diarrhea can lead to dehydration, so make sure to give your dog access to water at all times. Many people also offer unflavored Pedialyte to maintain electrolyte balance. Cures from the Cupboar If the veterinarian gets negative results, or if infection is suspected, you may be advised to get a fecal wet mount through stool preservatives, concentration methods or through fecal Baermann...

What Canine Stools Tell You About Diarrhea beingstray

Hi, my puppy had diarrhea for the third time in 3 months over the weekend. He had once in late December, again in Feb, and then again this past weekend. He got stool samples done each time and they've come back negative for parasites every time. The first time he had it the vet prescribed him metronidazole which we used for a few days until he. Diarrhea also means a decrease in the bodily absorption of water, electrolytes, and required nutrients. How serious the illness is will be determined by how long the diarrhea has been going on, and what signs accompany it. Diarrhea is a common ailment for dogs, and can range from a mild case to very severe. Described as frequent, liquid stools. Every dog occasionally has abnormal dog stool, such as constipation or diarrhea. However, there are times when abnormal stool is a cause for concern. Diarrhea. Most veterinarians define diarrhea as stool that is softer than it should be. This can occur for a variety of reasons, most commonly from dogs consuming something that disagrees with them

Chronic Diarrhea in Dogs. Chronic diarrhea is a change in the frequency, consistency and volume of the dog's feces for more than three weeks. Starting in the small or large intestine, diarrhea can either be secretory (where it is very watery) or osmotic (not watery), and is due to various reasons, including diet, disease, or infection QUICK (2 MIN.) IN-DEPTH (5 MIN.) The first thing you should do if you find blood in your dog's stool, whether the stool is formed or loose (like diarrhea), is to call your veterinarian. You can. This requires a small sample of stool from your dog. The veterinarian will check this to rule out parasites such as hookworms, roundworms, whipworms, protozoal organisms, and bacterial overgrowth. Even if your dog is up-to-date on monthly prevention, it is still possible to find breakthrough parasitic infection Fecal samples are not 100% accurate. There are not always parasite eggs in every bit of stool passed by your dog, even if he is infected. That means that your dog could have parasites and get a negative fecal result. If your veterinarian highly suspects parasites, even though the sample comes up negative, he or she may wish to deworm your dog. If the fecal examination is negative, but I'm still suspicious that Giardia is the cause of a pet's diarrhea, I will run a Fecal ELISA (enzyme-linked immunosorbent assay)

Testing for Diarrhea VCA Animal Hospita

  1. Dog diarrhea caused by parvo is often profound and debilitating, requiring intensive care hospitalization. Untreated, survival from parvo is less than 25%. With intensive veterinary care, including several days (and hundreds of dollars worth) of intensive care, including antiviral drugs, antibiotics and fluids, survival can approach 75%
  2. istering a whipworm dewormer. Response to treatment is an indication that whipworms were present, but could not be detected on fecal exa
  3. Q: If my dog has diarrhea, can I just drop off a stool sample for testing? A: We may need to assess the overall status of your pet. A few diseases that cause diarrhea can be diagnosed via fecal testing, but most cannot. Most cases of diarrhea are fairly benign and easily treated, but sometimes there can be a very serious underlying disease

Dog diarrhea problems

  1. Of the 2 control dogs that had persistent diarrhea on day 7, 1 dog was positive for C. perfringens growth and cpe on both day 0 and day 7. A fecal sample from this dog was negative for C. perfringens growth on day 14, which was after 1 week of metronidazole treatment. 4 DISCUSSIO
  2. The next day the diarrhea was worse and both dogs were in obvious discomfort. A stool sample revealed not only giardia but also a bacterial infection. They were put on a high dosage of baytril for 7 days. After about 5 days on the baytril their stools were completely normal, but both dogs remained very lethargic
  3. Discussion Starter · #1 · Oct 17, 2013. Sigh. I'm thinking the Panacur didn't work. A little over a week ago, Ellie started having some occasional loose stool. Nothing terrible and not consistent. Towards the end of last week, it was a bit worse and the stool looked grainy. I took a fecal sample in, which turned up positive for Giardia

Dog Blood in Stool Jelly-like. Seeing your dog pass stool that has fresh blood and is jelly-like is a good indicator that your pet is having an inflammation, also known as colitis in its lower section of the intestines or the colon. Typically, blood in dog feces diarrhea signals the possibility that the pet's colon is irritated leading. Sometimes we prefer to check multiple fecal samples because shedding may be intermittent, which can be the case with a giardia infection or whipworm infection. In a patient with diarrhea, we may end up treating for gastrointestinal parasites even though a fecal sample is negative because a negative result does not absolutely rule out all parasites Although his stool sample was negative, my vet diagnosed my 9 week old puppy with coccidia and started him on Albon. - Answered by a verified Dog Veterinarian We use cookies to give you the best possible experience on our website Medication: Because diarrhea in dogs can have so many causes, the type of medication that you give will depend on the diarrhea's underlying cause. If the stool sample that you bring to the vet's office tests positive for parasites, your dog will need an anti-parasitic medication, often called a dewormer, every day for about 7 to 10 days

an ELISA or PCR test for giardia for any pet with a history of GI issues. A fecal ELISA or PCR test is preferable to a fecal flotation test because it checks for the presence of giardia antigens. A fecal float only detects giardia cysts, which may or may not be in the particular stool sample being tested You need a fresh, warm stool so it is best to use a loop tool and take a sample from the dog. Even then, if the giardia cyst is not present, it will come up with a false negative. For some dogs loose stools are due to over feeding the dog, so before you worm or test, try cutting back a bit on their food for a couple of days and see if that. Whipworms will often cause intermittent diarrhea, however. Your dog might have diarrhea for a day, go back to normal for weeks, have another day of diarrhea, then go back to normal again, etc. If this keeps happening, and there is no other obvious reason for it, take a sample of the diarrhea to the vet Diarrhea and Laboratory Tests. Diarrhea is indicative of a gastrointestinal ailment. It entails passing loose stool frequently that may be accompanied by cramping, stomach pain (especially in the abdomen), vomiting, nausea, and fatigue. In some cases, the stool may also contain mucus and or blood. Acute Diarrhea lasts between one and a few days

Dog Stool Sample - Tests, Collection, Texture & Fecal FA

  1. A couple of episodes of dog diarrhea generally don't constitute an emergency. However, there are situations that do warrant an urgent evaluation. When your dog refuses food or water, vomits, or acts ill or off, a trip to the vet is indicated. Your vet may ask you to bring in a stool sample for analysis. A tablespoon is generally plenty
  2. ant. Stress can worsen symptoms
  3. istration of heartworm preventative drugs that also prevent intestinal parasites
  4. Dog has had black stool diarrhea, eating grass excessively, not e for 3 weeks, vet said she had intestinal flu. Finished with meds but still suffering. There is a possibility that your dog either has an ulcer in the stomach or a foreign body in the stomach, both would explain the black stools. i would recommend an endoscopy next, this procedure.
  5. ing it under the microscope. Flotation — A flotation (also known as a float) is the most common method used in veterinary hospitals and involves mixing the stool sample in a special solution that allows the eggs and.
  6. I came back home had a few more normal stools but I would have diarrhea every 3 days . then after a few weeks it got so bad where I was having it everyday sometimes 4 5 time it was terrible. I talked to my Doctor and she recommended a stool TEST which came back negative and then she said ok fair enough u need a colonoscopy
  7. Here we go - 8 different poop or stool meanings. 1. Lao sai - Watery poo (Diarrhea) Poop Meaning - Lao Sai - By Pawmeal. Ok, let's start with lao sai. (Some of you may not feel very pleasant as you are reading this ). One of the more common poop problems is when your dog's poo becomes spurts of liquid

Dog Diarrhea: Treatment, Causes & Remedie

For example, the test may fail if blood is not distributed evenly throughout the stool sample, or if bleeding occurs intermittently rather than continuously. In these situations, the amount of blood in the stool will be quite variable and as a result a particular stool sample could show Negative for occult blood, even though there is blieeding. When you call the vet to make the appointment, ask if they want a sample of your dog's stool to check for viral and bacterial infections. Most vets will want to examine the dog's stool thoroughly When culturing equine feces, it has been recommended that at least 5 serial samples be cultured to increase sensitivity (estimated at around 55%). 78 If the specificity of the test is estimated at 99% and the sensitivity of any culture method for dog and cat feces is greater than 45%, 3 consecutive negative cultures are needed to be 90%. Fecal testing involves the collection and inspection of a fecal sample. Stool samples should be examined within a day of their collection. In some cases, fecal testing is performed on-site by the veterinarian. In most cases, fecal tests are performed to detect the presence of intestinal parasites including tapeworms, roundworms, and hookworms. Skip a meal. Yes, do NOT feed your dog for at least 12 hours. Water is to be given, just do not allow your dog to drink large amounts at a time. 2. Take your dog out often, and look at the stool after he goes, even at midnight. Collect a stool sample in case your veterinarian wants to check for parasites. 3

Loose stool can be a minor event or a serious condition. Diarrhea can be acute (meaning that it begins rather suddenly and lasts more than 48 hours) or chronic (lasting more than three weeks, sometimes varying in intensity from day to day).Sometimes the reason for it is obvious, but more often, the exact cause can be surprisingly difficult to identify Types Of Dog Diarrhea. Dog diarrhea is categorized into types according to duration (acute vs chronic) and location (small bowel vs large bowel). Let's go through each of these. Duration. The duration of the illness may help you and your vet better understand whether this is a short-term concern or a longer-term health concern to be watched and treated

How do I collect a stool sample for the vet? There's nothing fancy about it. I recommend taking a small, sealable bag when you take your dog for a walk or scoop the cat box just before the vet appointment. Using the bag like a glove, pick up a small piece. You might also want to use a plastic spoon to collect a small amount to put in the bag A veterinarian will typically use one of these drugs alone and recheck the pet and a stool sample within 14 to 28 days after finishing the medication. If the pet still has diarrhea and is positive a second time, I'll usually combine both drugs together, complete a second course of therapy, and recheck again in 14 to 28 days Store the sample in a fridge before the appointment. If you can't get a really fresh sample, for instance your dog only poops in the morning and you have an appointment in the afternoon, then store the sample in the fridge. This will help to keep the stool fresh enough so that any tests that are run on it will be accurate

Fecal Test for Dogs: What It Is, When It's Done, Costs

A fecal (stool) exam, also called an ova and parasite test (O&P) This test is used to find parasites that cause diarrhea, loose or watery stools, cramping, flatulence (gas) and other abdominal illness. CDC recommends that three or more stool samples, collected on separate days, be examined Puppy (9 months) with regular soft stool. I have a 9 month old chocolate lab and she has had soft stool (never diarrhea) since I brought her home. In the morning it starts firm and ends soft; soft the rest of the day. Full of energy and no other signs or symptoms of medical issues. She's been been to the vet for 2 checkups and checked for. Mucus in dog diarrhea can also indicate a negative reaction to something the dog ate or a change in diet, Irritable Bowel Syndrome or Inflammatory Bowel Disease. Viruses Parvovirus attacks the lining of the gastrointestinal tract and produces large amounts of diarrhea loaded with blood and mucus

STILL have diarrheascared

  1. As mentioned above, the definitive test is to find whipworm eggs with a test of your dog's stool sample. This test needs to be performed correctly and on a relatively fresh sample. Sometimes your veterinarian will make a presumptive diagnosis of whipworms, even in the face of a negative stool sample test, based on clinical symptoms and.
  2. Stool Sample Tests for Diarrhea. Carrying out a stool sample test for diarrhea is essential as it helps the doctors to identify the condition a patient has as well as identify the available bacteria's in the stool. Also, it is an effective way of identifying the best treatment to kill the bacteria or viruses
  3. istration of whipworm dewormer may help in relieving the symptoms, indicating that it had whipworms, which was not identified during the fecal exa
  4. If your dog is showing any of the above symptoms (especially vomting and/or diarrhea) it is very important that you bring a stool/fecal/poop sample so we can screen for parasites. However, worms don't always shed eggs in the stool, resulting in a negative (i.e. No parasites Seem) fecal result
  5. The dog was presented with a total of 100 stool samples: 50 were positive for C difficile and 50 were negative. The dog gave a positive response to all 50 positive samples and a negative response to 47 of the 50 negative samples, with the remaining three negative samples recorded as an inconclusive response

My dog LOVES these and they helped cure his stomach issues! My senior dog started having bloody diarrhea out of nowhere. I took him to the vet and despite his stool sample being negative, the vet guessed it was probably parasites and prescribed him meds. Didn't work. I started cooking for him and fed him a bland diet of rice and plain chicken I have noticed small white balls in my stool Rectal Mucus/ Chronic diarrhea, stool test for infections and parasites came back normal White, seed-like spots in stool; strenuous BMs chronic stomach pain, indigestion, bloating, and nausea after parasite infection Chronic Diarrhea White spots in stool strange spongy white object in stool sac like. I read that the protozoa giardia is a common cause of diarrhea in dogs and can go undetected in stool samples as the cysts aren't shed in every bowel movement. Panacur isn't suppose to have much if any side effects, so I decided to try it instead of antibiotics The stool samples are collected in a clean container and evaluated by detecting color changes on a test card, or by sending the samples, in a special container and envelope, directly to the doctor. Your dog's poop reveals the inner workings of his digestive system. If his feces start changing color, it's imperative to find out the cause. If your dogs is producing poop in a shade other than brown, something is amiss. Collect the stool sample and take your pet to the vet for diagnosis and care

Stress & Diarrhea in Dogs Cutenes

If the host has diarrhea, both trophs and cysts may be shed in the diarrhea; either form can be found in fresh stool. After infection, it takes 5 to 12 days in dogs or 5 to 16 days in cats for Giardia to be found in the host's stool. Diarrhea can precede the shedding of Giardia. Infection is more common in kennel situations where animals are. I suspect your cat has some type of parasitic or infectious diarrhea. It is usually easily detected in a stool sample, however, and the stool samples you submitted came back negative. Still, you might want to discuss with your vet the option of treating this condition, to see if the kitten responds

My dogs stool tested nrgative for worms but i just kno she

With so many possible causes of blood in feces, you'll need to examine and see whether your dog has diarrhea or if it's normal in consistency. If your dog is pooping blood in his stool, you'll need to bring a sample to your veterinarian. Black, tarry feces can also be a sign of intestinal bleeding or bleeding from the stomach Dogs infected with giardia will have gastrointestinal symptoms. It will cause large volumes of mucous-y, very foul-smelling stool, Dr. Jensen explains. It can make it very difficult to. Fecal occult blood test: The fecal occult blood test (FOBT) is a lab test used to check stool samples for hidden (occult) blood

Video: My Dog Has Diarrhea, What Tests Need to Be Done

When lymphoma is in the gastrointestinal tract, cats and dogs may show signs of vomiting, diarrhea, and blood in the stool. Lymphoma can also affect the spinal cord, kidneys, eyes, nose, and skin. Signs are associated with the affected organ, such as impaired movement with spinal lymphoma, increased drinking and urinating with kidney lymphoma. Stress colitis is another common cause of blood in dog stool and originates from the large bowel, causing diarrhea. Your dog may strain and pass bright red blood. The causes of stress colitis vary, but they include environmental stress, infections, parasites, allergies, physical trauma, autoimmune disorders, and IBS

Discussion: Diarrhea following the use of broad-spectrum antibiotics implicates pseudomembranous colitis as the cause. The patient did not respond to oral vancomycin therapy and had a negative stool assay for C. difficile toxin. This patient was believed to have Pseudomonas enteritis, which was confirmed by 2 positive stool cultures The vet immediately prescribed the Metronidazole again, this time just half a pill for a dose. She went back to normal immediately. Now again, we've stopped and it's the same pattern-increase frequency and then diarrhea. Stool sample was negative twice for parasites! Wondering what to do. I've read about IBS, but not sure if that's it

What to Do If Your Dog Has Diarrhea - The Spruce Pet

  1. When small intestine diarrhea in dogs causes a dog to have firm stool followed by loose stool, it is a symptom of disease. This disease is one which affects the gastrointestinal tract, but there are various causes which can lead this to happen: Infectious enteritis (caused by various bacteria and intestinal parasites including Campylobacter, Giardia, Histoplasma and Phycomycosis
  2. (See also chronic diarrhea)-Shigella-Salmonella-Campylobacter-Yersinia*-Vibrio*-Enterohemorrhagic E.coli *Notify lab if suspected Stool Ova & Parasite Exam Giardia/Cryptosporidium Immunoassay C. difficile test Colonoscopy Ulcerative Colitis Crohn's Disease Mesenteric Ischemia Radiation Colitis 20-40% of cases no cause is found No Yes Negative.
  3. One of the most common causes of diarrhea in cats and dogs is intestinal parasites. Intestinal parasites are so common, veterinarians almost always ask that you bring a stool sample when the pet has an appointment. There are several different types of intestinal parasites a dog or cat can get, including roundworm, tapeworm, hookworm, whipworm.
What's Hiding in Your Pets Feces- It's Giardia - Vet In

The diarrhea panel was testing for bacterial issues. He is on Solid Gold Wolfking Adult. The stool doesn't seem grainy, but I'll take a look tonight when we go out. His stools when he was on raw diet (mostly chicken + supplemental) his stoold were small tight and firm about half the size you'd expect from a 135lb dog Take note that diarrhea with severe vomiting can cause dehydration, so seek early treatment. 3. Unusual Stool. A dog's stool can be an indicator of their overall health. Usually, a healthy dog will have firm, small, and moist stools. On the other hand, dry and hard stools can be a sign of a health disorder, dehydration, or dietary problems Dog has yellow diarrhea. The presence of yellow colorization in your dog's stool may signify that your dog's liver has a problem or the food went through the gastrointestinal tract picking up bile. However, you are strongly advised to consult an animal specialist to receive an authentic answer about what is wrong with your dog Chronic diarrhea is a common problem in dogs and cats. Diagnosis can be difficult and challenging for veterinarians due to the large number of possible causes of chronic diarrhea. Following a logical and thorough diagnostic plan is essential to efficiently arrive at an accurate diagnosis. This seminar will review the author's approach to the diagnosis of chronic diarrhea Negative stool test but have severe c. diff symptoms. Hi Everyone. Two weeks ago, I was prescribed 500 mg. twice per day of Keflex for mastitis from breastfeeding. By the fourth day on the antibiotics I had full-blown diarrhea, flu-like symptoms, chills, aches, couldn't get out of bed, nausea, vomiting. I stopped taking the Keflex anitibiotic.

Keep in mind that both constipation and diarrhea can cause blood in a dog's stool. Bright red blood without either diarrhea or hard, dry stools generally indicates the problem is closer to the. Chronic diarrhea is defined as a predominantly decreased stool consistency lasting longer than four weeks.1, 2 The prevalence is estimated to be 1% to 5% of the adult population.1 Common causes. Diarrhea for 10 days now. tomas923. I developed watery explosive diarrhea 10 days ago. After 5 days I went to my PC doctor and they did bloodwork and a stool sample. The stool sample came back negative for whatever they tested for however my whiteblood cells were very elevated and I was told if it was still bothering me to go to the ER In early summer, Caleb had diarrhea for a day or two, but then it cleared up. He vomited once, and again a few weeks later. The diarrhea came and went again, but even his better-formed stools smelled bad. Our local clinic did a float test of a stool sample, telling my friend Janice and I that this could detect both worms and Giardia A doctor usually asks for a stool test to be done if specific symptoms cannot be diagnosed open-eyed. Some of the symptoms of a stool test may be. Diarrhea that may last for more than a few days. Blood in the feces. Severe stomach pain and cramps on a recurrent basis. Throwing up, fever and nausea. Problems in the gastrointestinal tract

How to Treat Bloody Diarrhea in Dogs - The Spruce Pet

A 51-year-old woman presented with a 6-month history of diarrhea. She had 6-7 loose stools a day without bleeding or pain. The patient had not lost weight, and complete blood count and chemistry panel were unremarkable. Multiple stool tests for white blood cells, occult blood, and pathogens were negative, and a flexible sigmoidoscopy by her internist was normal If possible, bring a fresh sample of your dog's stool for the veterinarian to test. Even if your dog is acting fine, at least contact your vet to have a discussion about your dog pooping blood. Red always calls for a call, Dr. Jensen describes. There are many causes of blood in the feces, some of which are very major infantile diarrhea in developing countries Limited data in EAEC and EPEC. Many patients recover without antimicrobialtherapy. Antibiotics have been shown to shorten the duration of illness in ETEC and are generally indicated for moderate to severe diarrhea (>4 stools/day, fever, or blood or pus in stool). Fluoroquinolone x 3 days

If you notice black or tarry stool, bloody stool, frequent vomiting, signs of abdominal pain, lethargy, or diarrhea lasting longer than 48 hours, take your dog to the vet immediately. Otherwise, if your dog is healthy apart from having diarrhea, it can probably be treated safely and effectively at home Since the causes of diarrhea can come from anywhere in the body, from the brain to the gut, there are a wide variety of tests that may be performed to diagnose the cause. Your doctor will complete. Giardiasis can be an important cause of illness, especially diarrhea, in animals and man. However, the majority of dogs infected with Giardia do not have diarrhea, vomiting or any other signs of illness. The Giardia organism has two forms. A fragile, feeding form exists in the gut of infected animals, while a hardy cystic form is shed in feces. Dogs and Diarrhea. If your dog has diarrhea, then you're already familiar with the signs: loose, liquid-like stool, with frequent trips outside to relieve the bowel. Diarrhea in dogs can occur suddenly and last as long as a day or two up to a few weeks or months. If your dog's diarrhea persists for more than a day, dehydration can be a concern

Filter culture of the patient’s stool sample

Recurring diarrhea problems, stool samples negative

Analysis of stool sample 1- Randum stool sample or timed collected a- Randum sample provide diagnostic clues as stool provide diagnostic clues as stool Na, K, pH, occult blood testing, WBCs, fat content, for laxatives and markers of inflammation as lactoferrin. b- Collected samples: - 48-72 hrs - Regular diet with fat 80-100 gm fat The aim was to characterize differences in fecal consistency, and fecal microbiota and metabolome profiles in dogs with acute diarrhea (AD) treated with either fecal microbiota transplantation as enema (FMT; n = 11) or oral metronidazole (MET; n = 7) for 7 days. On days 0, 7, and 28 fecal samples were obtained. Fecal samples from healthy dogs (HC; n = 14) were used for comparison Bringing a stool sample to your vet is a good idea to find out exactly what you are dealing with. Fixes If diarrhea continues, it puts stress on a dog's systems and you'll end up with IBD - Irritable Bowel Disease - and this can kill a dog if not treated nature. In some cases, dogs will exhibit diarrhea that is soft, frothy, greasy, and with a strong odor or excessive mucus.2 Rapid diagnosis of giardiasis in dogs with diarrhea is very positive samples and 81 negative samples were identified. These samples were then tested using the four in-clinic tests following manufacturers' protocols. Purina Pro Plan dog food gets a low review for dubious quality and a number of harmful ingredients that canines cannot digest. The first ingredient listed is fresh chicken, but because it loses eighty percent of its weight during cooking, it should be positioned lower on the list. The more probable dominant ingredient on the list is brewer's rice, or fragmented rice leftovers from processing.

Fecal flotation for detecting parasite burdens in faecesFecal Stock Images, Royalty-Free Images & Vectors

A dog with the parasite looks unhealthy and has a poor appetite; the linings of its nostrils, lips, and ears will be pale. If hookworm larvae get into the lungs, the dog will cough, as well as present several other symptoms, including dark and tarry stool, diarrhea, and constipation. Death can come suddenly if the dog is not immediatelytreated Patty the vets never found the worms. His stool sample was clean as a whistle like it always has been. All I know is they were white and about as long as my pinky nail. They gave him the wormer anyways. Of course I never thought to bring that poop I saw them in with me! I figured if I was seeing them then it would show up on a sample Treatment with oral metronidazole, 250 mg given t.i.d. for 10 days, resulted in stool samples that tested negative by microscopy but positive by EIA; a 20-day course of metronidazole resulted in slight improvement of symptoms, but stool samples again tested positive for Giardia in January 1997 The normal stool (poop, feces) usually is light to dark brown.; Although changes in stool color or texture may be normal, most changes should be evaluated. The symptoms associated with stool color changes, if any, are the symptoms of the underlying cause of the change, for example, foods, drinks, or illnesses such as:. Diet (beets, diets rich in green vegetables, licorice