Start studying Eukaryotic Cell Parts and Functions. Learn vocabulary, terms, and more with flashcards, games, and other study tools.
Report Abuse. In general puppies should not have untreated diarrhea for more then 24 hours. For adult dogs that can be extended to three days depending upon the size of the dog. Diarrhea is a sign that something is wrong.
So if youâve got a dog with diarrhea, some of the most common causes for you consider are: 1  Diet changes like switching your puppy to new food. 2  Feeding your puppy too much food. 3  Allowing your puppy to eat whatever it wants, even garbage which may contain worms.  Stressful situations are associated with dogs and diarrhea.