My butter male has a greenish spot under his belly. I spoke to the breeder (since I got him 4 - 5 days ago) and he said it was feces that hasnt been passed yet. I looked a day later and there was his stool on the paper towels. I checked under his belly and the greenish spot was still there. I dont know what it could be, and I plan to feed him tomorrow. Hopefully he will eat but for now I hope the greenish spot isnt bad. Tanks temps are 87 and 77 hot and cold. Any ideas to what this may be?