Cloud sometimes makes a humming sound when he is hopping around me, it sound like "hmmm", and is in the same rhythm as his hops. But at other times he makes a different sound, he makes that sound when I come to see him and he stands up and says hi to me. That sound is probably more like a buzzing, it sounds as if he presses the air out of his nose and ears, something like "bffffzffffbbfffffffffftt". Similar to a human **** really. :lol: