Cat urination outside of litter box

Question
My cat is a 6-yr.-old North American shorthair--loving, trusting, friendly, good with children and our other cat, not to mention beautiful.  We bought him, our first and only purebred, from a breeder.  Her cattery, the basement of her split level house, was very smelly.  In fact, so was her house.  As soon as we brought our kitten home, he immediately marked our house in almost every corner available.  Once he was fixed, this behavior persisted.  Our vet rechecked him and said yes, the surgery worked, that there are just some cats like this.  We have tried everything to correct the behavior except frightening or punishing the cat.  We have bought many deterrant products, used calming sprays that come out of a steamer, spayed recommended unappealing perfumes, and once kept the cat in a separate room with litter and food for a week to attach him more to the litter pan.  By the way, he does use the litter pan and does groom himself well.  We also have barracaded all doorways and edges of rooms with box lids, but he gets around them.  At this point we are desperate and want to avoid putting the cat to sleep; we can't easily place him in anyone else's home, and he can't go outside on a farm, for example because he's declawed and too trusting.  Do you have any extraordinarily good news for us that will allow us to keep our sweet cat with us?  Thank you so much for your time.


Answer
1. if you got him from a breeder, you have to give him back if you decide to give him up. Most breeders reqiuire this.

2. has your vet tried prozac or amitriptylline yet? those can help.

but yes, i understand what you are going through. one of my boys pees on the garage door from inside the house and it drives me nuts! i have him on prozac and it seems to have helped.