Okay, So I got a 6 pack of frozen mice from Petsmart, had no problems with them at all. I set them out for an hour put them in hot water for another 15 minutes and they were perfectly fine. Yesterday I got some mice from Petco (because it's closer to me) and I did the same exact thing to these mice and two out of three of them have exploded open! I have no idea why this is. I read the instructions on the back of these once and I'm not doing anything wrong...Can anyone help me understand why this could be happening?
Both packs of mice were fuzzies if that helps any.