Okay one of my rats has this thing when he's eating something and I pet him he'll squeak at me, like I hurt him or something. Is that normal? My other one doesn't do that at all. He sits next to me while he eats and likes to be pet. Oh and the one that squeaks dosen't squeak any other time I pet him. Just while he's eating. Is that a common thing? Is it because he's a male? I'm not sure but I think he might be a little older then the other. Maybe a territorial type of thing?