I'm so sorry to hear this. My cat Alani was blocked and had injured his penis so badly that he needed PU surgery. I thought that this would be the end of his problems. He kept trying to spray when he'd become stressed or uncomfortable. He's now on Royal Canin Urinary S/O in the moderate calorie both canned and dry. He's also now on Prozac because the food alone didn't help him. I also use feliway plug-ins. He'll still sometimes have accidents but not as often as before. I feel your pain. I hope things will work out for you. Good luck.