I went to Petco to get some toys for the gang, and for some reason decided to stop & look at the birds & small animals. The mice are cute. I saw some naked looking mice or rats. 2 were sleeping, but one was kind of sleeping, but it looked like he was trembling, like he was cold. Who knows, maybe he was chewing on his toes or something. I've never owned rats/mice. So, I was concerned & asked the cashier if there was something wrong with it, and she said no, as if she could care less
She said a vet comes in every 2weeks & looks at the animals.