Okay, I have had Kevin for a month and a bit without having him defecate, pee, regurge, or let anything out of his body. I fed him yesterday morning with a 20 gram adult mouse (he is 180 grams) and he took it down with no issues. When I woke up today I found this (sorry about mouse blood stains)

I think and really hope that this is just poop, I am only asking because I have never seen boa poop, and this thing looks nothing like a BP poop.

Thanks for bearing with a new boa owner!