We just brought my parents' 5 year old cat parks to our apartment this morning as we are cat sitting her for two weeks. She had never seen another cat before i dont think, and she is drooling in the corner and freaks out and bites/scratches when anyone gets within 4 feet of her. She has never acted this way before, and the other cats just left her alone...I am worried that something might be wrong with her. She was my cat in the first place and now she doesnt seem to recognize me. HELP