Certain foods and medicines can cause black stool. Sometimes, black stool may even signal bleeding in the digestive tract.

If your dog has worms, you may find small grain-like worms in their poop. Tiny worm eggs may also be present in your dog's poop, but these are usually harder to spot. You may also notice ...

Your cat may have worms if they are vomiting, losing weight, or you see worms in their stool. Cats may get roundworms, tapeworms, hookworms, or heartworms. You can treat a worm infestation with ...