Sorry if this is the wrong place I am puzzled where to exactly put it. I was holding my rat Sherlock and petting him as he was bruxing and suddenly he made a weird chutchutchut in a tone that reminds me of a monkey: it was like chatter. I have never heard Bug do this and it is quite loud. I tried the ear phone to see if maybe it was rattly lungs or something and his lungs were as clear as a whistle. He stopped chattering when he stopped bruxing. Is something wrong or is it a odd rat behavior I have not seen.