Dog Diarrhea: What to Record Before You Call the Vet

If your dog has diarrhea, record the pattern and how the dog feels—not just the stool's appearance. Contact your veterinarian promptly for blood or black, tarry stool, vomiting, reduced appetite, lethargy or a dog that seems unwell. Persistent or worsening diarrhea also needs advice.

Cornell's canine diarrhea guide explains that associated illness and the duration of diarrhea matter when deciding on care. Do not treat a general timeframe as a reason to wait with a sick puppy, an older dog or a dog with a known medical condition.

A clear description beats a guessed diagnosis

Note when the loose stool started, how many episodes you observed and whether the dog is also straining, vomiting or acting differently. Describe visible blood or a black color without deciding where it came from. A photograph can help the clinic understand your description, but it cannot establish the cause.

When you call, say whether your dog is eating, drinking and behaving normally. If you did not see a bowel movement yourself, distinguish a household member's observation from your own.

Build a short timeline

On smaller screens, swipe the table to see all columns.

This is a suggested recording format, not a diagnostic scoring system. Start with the details you have; do not postpone a call until the table is complete.

Include more than the main food

Have the exact food name and package available. Mention table scraps, training rewards, food used for pills, new supplements, chews, medicines and anything the dog may have found outdoors. If exposure to a toxin or swallowed object is possible, tell the clinic immediately.

Diarrhea beginning after a food change does not prove that a particular protein is an allergen. It also does not establish that switching to another format will solve the problem. Avoid turning the next day into a series of unplanned recipe trials.

Ask about the next meal and a sample

Ask the veterinary team what to offer, whether a sample is needed and how to collect and transport it. Cornell recommends bringing a stool sample to the veterinary visit. Follow your clinic's specific instructions rather than guessing about storage or waiting for another episode before seeking help.

Do not give human antidiarrheal drugs or impose a fasting plan without veterinary guidance. Advice suitable for one healthy adult dog may not suit a puppy or a dog taking medication.

Keep the recovery plan specific

Write down any agreed diet, portion instructions, medicines and signs that should trigger another call. Ask when to return to the usual diet if a temporary feeding plan is recommended. Do not keep an improvised short-term diet indefinitely.

Once the clinical issue has been assessed, our gradual food-change guide can help organize a planned transition. If the veterinary team is investigating a food allergy, keep to its instructions rather than substituting a retail recipe based on the front-of-bag protein name.

Published by PARTNER Editorial Team for general education. Your veterinary team can advise on your pet's individual health and feeding needs.