(tagged NSFW because images of a dead rat)

Hi! My bag of frozen rats has a few of these weird rats and I was wondering what specific breed they are! Their fur is a lot shorter than usual, their skin is soft and has many folds, and their tails are only about half as long as the tails of the “normal” looking rats in the bag. Maybe they’re younger than the other rats?

They are around 35g heavy. I’ve fed one today and was pleasantly surprised at how little it smelled while heating up. Plus my snake took it so much more eagerly than she usually does. So I’d love to know what exactly this rat is so that I can specifically order some more :)