Oh Katie, you have my sympathy. I totally understand about the frustration (and anger) and being at the end of your rope. I was ready to just open the door and let a few of mine experience the great outdoors a couple months ago. Fortunately the generic Prozac has been wonderful for Rocky and Scout's feeling better with her kidney and bladder stones so she's stopped (knock on wood) but now Rumor has started. She did it the first time two weeks ago immediately after I plugged in a new Feliway refill. I've since unplugged all the feliways but she has continued to pee in that area. I talked to the vet about it and after discussing it we've decided that with Rocky mellow on Prozac the pecking order in the house has changed and Scout is now picking on Rumor and this is how she is dealing with it. I don't have a clue how to handle that.

I'm so sick of it. I get one cat stopped and another one starts. When will it end!!!!

I can share one thing that has helped me and maybe I've already told you this but Zero Odor is great for getting rid of the pee smell. My vet recommended it and you have to order online or by phone but so far it's been worth every penny. It's the first product that I've found that really gets rid of the urine smell in carpet. I've read that it can bleach dark colored carpet but mine is light and I have no problem.