Can dogs poop out of their mouth?
A dog can vomit, just like people, but it can't "poop" out of it's mouth.
if your dog is on a leash when it eats that yukky poop,pull your dog back and tell him "leave it" with a firm voice. if that doesn't work, get infront of your dog (don't step in the poop!) and snap your finger at your dogs mouth. Do not get your hand to close to your dogs mouth! Your dog might have a much more different response