My rat Ruby is about 6 mths old, adapted well to humans, and seems to love me..m. But when I put her back in her tank after playtime, she seems almost "angry" about it, immediately starts "attacking" her toys like toilet paper tube or whatever. Last nite she even tried to jump out, which resulted in her bashing her face against the chicken wire on top. No injuries, but she didn't try that one again. She also seems to get very excited wen I hold her, and her breathing speeds up and sometimes even sounds like "chattering". Any ideas, thots, comments on this???