A. Black tarry feces are a sign of a gastrointestinal bleed. The feces are black when blood gets digested. Such a bleed can be caused by hookworms, an injury in the stomack or small intestine (e.g. By a sharp bone or foreign body), toxin ingestion , ulcers, etc. You should worm your puppy, but if, after worming, the feces remain tarry you need to take her to a vet. Also check her gums. They should be pink. If they are white, your puppy needs to see a vet ASAP.
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