Could have been an issue with the freezing and shipping of those rodents. Where did you get your feed from?

I have only used Big cheese rodent as a supplier so I can't attest to any other but they are amazing with shipping and packaging. It arrived frozen solid and packed so well that my last few are as good as the first few I ordered last batch. They only ship Monday and Tuesday to avoid issues with delivery and they use dry ice and insulated packages to ship.

I hate buying from big pet stores or reptile shows because I have no idea how they have been stored and most reptile shows just sell in a frozen bag that is not prepared in a way that makes it easy to keep them free of getting freezer burn.