Worst I had was one of my BP rescues who is still on live for the first few meals... she grabbed a male mouse by the rear end and when she constricted, it caused her teeth to slice through a rather unfortunate area. Not quite guts coming out or anything that bad, but a lot of blood (from an unfortunate spot... poor boy mouse...).

Luckily she's on paper towels and has plastic hides, easy enough to replace or wipe clean after she digested.

I've luckily never had guts coming out, I'm always careful to thaw f/t slowly to do what I can to avoid that mess.

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