I fed my three snakes last night, f/t rat pups. So far I've been lucky I guess, and never encountered this phenomenon... But this time all three of the pups blew up when struck. In a major way. I don't get it. They didn't appear bloated or discolored or anything that would indicate issues.

Anyone have a trick to avoiding this? Perhaps a certain thawing method? Doesn't really bug me, but it sure makes for a messy cleanup.