Dogs have a habit of sampling just about anything they can get their mouths on, and that curiosity often results in an upset stomach. Occasional diarrhea is fairly common for dogs, but it’s not always harmless. In some cases, diarrhea can be a warning sign of a more serious health issue that requires evaluation by a veterinarian.
WHAT TO LOOK FOR (OR WHAT YOU MIGHT SEE)
The most obvious indicator of diarrhea in dogs is loose or watery stool. Along with changes in poop consistency, your dog may also vomit, lose interest in food, or appear more tired than usual. Weight loss and a general lack of energy can also accompany prolonged digestive upset.
CAUSES
When an otherwise healthy dog develops diarrhea, the cause is often something he ate that didn’t agree with him. Stress, sudden changes in diet, or new treats can also trigger digestive issues. That said, it’s important to monitor your dog closely for additional symptoms.
Diarrhea can also be caused by intestinal parasites such as roundworm, hookworm, and whipworm. Other potential causes include bacterial infections, inflammatory bowel disease, liver disease, and even heart disease. Because the range of causes varies widely, persistent diarrhea should never be ignored.
DIAGNOSIS
To determine why your dog is experiencing diarrhea, your veterinarian may ask for a sample of your dog’s poop to perform a fecal exam. This helps identify parasites or bacterial imbalances. Depending on your dog’s symptoms, additional diagnostic procedures may be recommended, including blood work, X-rays, ultrasound imaging, or in rare cases, surgery to pinpoint the underlying problem.
TREATMENT
Even mild diarrhea can take a toll on your dog’s health, particularly for puppies, senior dogs, or dogs with existing medical conditions. These groups are more vulnerable to dehydration and complications. If you’re unsure how to proceed, contact your veterinarian for guidance.
Seek veterinary care immediately if your dog has frequent, watery diarrhea or produces black, tarry stools, as these can be signs of a serious and potentially life-threatening condition.
If your dog is otherwise healthy and showing no additional signs of illness, home care may be appropriate. For simple diarrhea without vomiting, consider the following steps.
PROVIDE WATER
Maintaining hydration is critical. Continue to offer fresh, clean water throughout the day, giving small amounts frequently to help prevent dehydration. If your dog is reluctant to drink, adding a small amount of diluted chicken or beef broth to the water may encourage intake.
PROVIDE FOOD
Temporarily withhold food for about twelve hours to allow your dog’s digestive system time to rest. Once vomiting has stopped for at least six hours, you can begin offering a bland meal made of boiled chicken and white rice.
If your dog keeps this meal down for a couple of hours, you may offer another small portion. Slowly increase the portion sizes while spacing meals farther apart until your dog’s poop returns to a normal consistency.
MEDICAL CARE
If your dog’s diarrhea lasts longer than twenty-four hours, contact your veterinarian. Should your dog’s condition worsen at any point—such as increased lethargy, vomiting, or refusal to drink—seek veterinary care immediately.
PREVENTION
Once your dog’s stool has returned to normal, the goal is to reduce the likelihood of diarrhea happening again. You can help prevent future episodes by following these guidelines:
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Avoid sudden changes to your dog’s diet
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Do not give bones, as they can splinter and cause internal injury
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Keep small toys and objects out of reach to prevent swallowing
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Refrain from feeding table scraps
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Do not allow your dog to scavenge outdoors
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Ensure your dog is current on all vaccinations and preventive care
When diarrhea occurs, staying calm is important. Often, the cause is something minor, such as food intolerance. However, if symptoms persist or worsen, your veterinarian may need to rule out more serious health conditions. Prompt attention leads to quicker diagnosis and faster recovery. When in doubt, reach out to your veterinarian—the sooner you act, the sooner your dog can get back to feeling like himself again.
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Happy Tails!

