I have 2 male unneutered rats that I adopted earlier this month. Both have been to the vet and are healthy.
The thing is, every so often, my rats will chatter. The hooded one, Ichigo, will do it more than the albino, Sesshoumaru, but both will do it on occasion. At first I thought it was him grinding his teeth, but then I noticed it was going in-tune with his breathing. Then I was worried it was a myco infection, but the chatter goes on and off (plus the vet deemed him healthy about a week ago).
I think he does it more when he is excited. For instance, when I introduced a family member to the cage, he was at the front of the cage, sniffing and chattering. Or sometimes when the two rats tumble around, he will do it.
What is this noise, and what is the trigger? Is it fear, or is it just excitement? Should I be concerned? Any help is appreciated.