Lydia has been acting very differently lately, she keeps to herself, & seems very agitated. she's been absolutely vicious to her kittens. anytime they come withing a couple feet of her she starts growling, then she jumps up & hisses & swats at them. She attacks them, pins them down & bites them, she won't even stop when they are crying. she doesn't let them get away either. I don't understand what could be wrong with her. I think she may be going a little crazy. she seems to be possessed. I don't recognize her at all anymore. Any ideas out there?