i have a 5 year old cat and she has started biting and scratching herself constantly. she has bitten most of the fur off of her rear end and some off her tail and all over her body. she has sores on her neck and face and all over her body from constant scratching and biting. noone can even touch her anymore. she is always bloody and scabby and all we can do is put her on the porch. i hate to isolate her but she is extremely aggressive towards my other cats and people. i wish i could take her to the vet but my family cannot afford to do so. i am wondering if there is anything that me and my family can do. also im affraid that if we did take her somewhere they would think we did all of those things to her body. i dont know what to do. she has lost so much weight and she looks very bad. someone please help me out. thanks.