I just got my rat Sam about two weeks ago. I had a rat in the past that lived to be 4 and half years old. My question is do rat's "talk"?. It's not a sqeak or a weezing sound. it's like a grunting,he does this the most when I am holding him.His breathing is clear, but he has been sneezing, so I am taking to vet just be safe. I just wanted to know if this was "normal"?