My friend just got a hamster and when it is walking around it's cage, or is disturped it makes a kind of chirpy, squeek. It is pretty regular. I looked around on hamster sites and they all said hamsters were quiet and none mentioned this noise. I'm a bit confused. Can anyone tell me if it means it is distressed/upset? Unfortuately I don't know what kind of hamster it is as it's not mine.