I'm sorry to hear about Lily's health and the need for an operation. Of course you will do what has to be done to hopefully help her; I understand. Now let's hope and pray that the vet can remove whatever and that she will be alright. Poor cat must have been in quite a bit of discomfort. She's a beautiful girl. Good for you for persisting until your vet found the problem. You're both in my prayers... Kay in NC