LOL Vincent, they know you're looking at them for food so yeah, I'd bite too! These babies just like to curl up to your neck and nuzzle you. Sometimes they'll give eskimo kisses, but only if they know you.

And yeah, my kids are a little upset with you cuz I told them what you said!
Rats aren't mean biting rodents. . . they'll probably one of the least likely to bite and very clean. (at least mine are, I don't go get them at the NYC subway, LOL) But you can feed the hamsters all day long. . . they're the little nippers, especially the dwarfs!