Hi! One week ago I took in a small kitten that I found outside my apartment. I think she was either dropped off or something happened to the mom (I live near a busy street). She's a great little kitten, very cuddly and playful. My one concern is her poop. I had her on KMR 2nd step formula for the first 5 days and the whole time she had bad diarrhea. I figured it was just her tummy getting used to the new food, until 2 nights ago when I noticed a bit of blood in her poop. I decided I should start incorporating some solids into her diet so I began giving her small amounts of kitten wet food mixed with a bit of water. She ate it right up! Then earlier today I checked her litter box and there was a big solid poop. And just now she took another one. My concern is that the poops are very dark brown, almost black. At this point I'm not quite sure what to do. I was planning on taking her to the vet next week but is this cause to go sooner?