I have a female red squirrel. I'd say she's about 7ish months old. She is acting kind of funny today and when I went to feed her I noticed her back/spine area is like standing up and beside is is sunk down and her sides are like puffed out. I have no other way to explain it is have no idea what's going on with her and I'm kind of worried this has never happened with her before. She also got really defense of her fooder and like lunged at me through her cage that has also never happened before. Can someone please tell me whatsomething going on and if I should be worried or not?