I recently found a lump between my cat's shoulderblades. I took her to the vet, and they said to wait a few weeks to see if it grows. It grew a little bit, so I took her back yesterday. They are going to do a biopsy to see if it really fibrosarcoma. If it is, then they would need to do surgery to remove and possible radiation/chemo. My vet said that if it was her cat, she wouldn't put her through the radiation/chemo part of treatment because of her age. She is 13. I love her sooo much. She's not just a cat, she's more than that and I would do anything to save her. What should I do?