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Jane Lefler
Jane Lefler, Breeder,Behaviorist, formerVet Asst
Category: Dog
Satisfied Customers: 19590
Experience:  Former vol Vet Assistant.Breeder 18+ years Dog trainer / behaviorist
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my dog has black tar poop

Customer Question

my dog eats grass , throws up , and has black tar poop
Submitted: 9 years ago.
Category: Dog
Expert:  Jane Lefler replied 9 years ago.
Hi Gambit,

Black or tarry looking stool indicates digested blood in the stool. Digested blood in the stool indicates bleeding in the stomach or small intestines. This is potentially a life-threatening situation and should not be ignored. You can read more about this and the potential causes at the following site:

I urge you to have your dog seen as soon as possible. I hope this helps.