This is only my second breeding season so I don't know if this is normal or not but it really freaked me out! I paired these two together last week and thought there was a lock then but saw no evidence. Today I paired them again and saw a definate lock through the tub (I don't open to try not to bother them). I left the room for about 20-30mins to do some laundry while they were locked and came back to see they were unlocked and there was a lot of blood. I checked both snakes and I don't see any wounds so i'm guessing it's something from the vent? I don't see any blood on Butters(male) but i do see a little on Sita, near the vent(picture didn't really pick it up). Butters was bred by me last year and Sita was bred by Buzzard last year.
Here are the pictures.
Is this at all normal? Any guess at who it would have come from?
Here are the pictures.



Is this at all normal? Any guess at who it would have come from?