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I read that if a dog’s poop is black or very dark brown it means that there is internal bleeding in the GI tract.
My 5 month old Yorkie has been eating Raw from Blue Ridge Beef for the last 2 weeks, and he poops normally, but the color is very dark brown, almost black, and is usually soft.
He is very active and there are no obvious signs of obstruction that I can see.
Should I be worried?

I have a kitten who received Revolution but who just may have other intestinal parasites not covered by Revolution, so I took her to a new vet two days ago. I’ve taken fecal samples for other cats in the past, and they’ve always just checked the poop under a microscope in the vet’s office. This is a nationally-affiliated vet hospital, but they told me they would send it out and call me yesterday with the results. Well, they didn’t call, and when I called them at the end of the day, they said they hadn’t gotten any results in. So this was the second weirdness, as I’ve never had fecals done out of office and definitely have never had results on a simple test be unavailable the next day. I did pay for it, and the vet was very gentle and helpful with this kitten. But don’t you think this is unusual?