My BP had a perfect shed, one piece, but I noticed this on the substrate when I took it out. Could this be blood?
The only explanation I can come up with is that maybe it's a bunch of squashed snake mites, he had snake mites a couple months ago.. but I haven't seen any for a long time, unless there was a bunch of them clustered together on his skin and they came off and were squished when he shed? I feel like that's a stretch though.. and there weren't any black dots or sign of mites.
I looked at his whole body to see any sign of injury and there is nothing, and no red/blood/whatever on his skin anywhere.