Originally Posted by ancientgirl
If anything, it should be well formed and from what I understand should have very little odor.
You are right, thats exactly how it should be.
I am thinking maybe the OP is not feeding bone or enough bone.... some people think that raw feeding = raw meat. Lack of bone would lead to odd poo and deficiencies in nutrients.
Black thick ink sounds like poo that has old blood in it... A visit to a vet that understands raw feeding is a good idea.