my rat lucy is making strange noises. I'm not really sure how to describe it.... its like... a guinea pig noise...chirping...kinda thing. she first started doing it a couple days ago when i tickled her and now she makes it randomly wherever she is. could it be a resperatory problem? I tried to get audio of her but i don't know how much it'll help becuase you can barley hear her. but here it is (its only at the beging of the audio file but its very quite) : http://www.fileden.com/files/2007/5/7/1057175/lucysnoise.mp3