I posted back in December that my cat Patches was spraying and I got
professional help. It worked! Here's my old post. Hope you can use the link, if
not, copy/past it to url line
http://groups.google.com/groups?q=patches+spraying&hl=en&lr=&ie=UTF-8&selm
=20031205213736.15459.00000268%40mb-m03.aol.com&rnum=1

I didn't do everything the doctor said. I didn't use drugs, do mutual grooming,
try to keep outside cats away or use Feliway. I did everything else and it
worked instantly. He had two accidents since then which didn't ruin anything
because the upside down carpet runner caught it. He's now a happier cat. I
think the thing that helped the most was extra litter boxes and his own
scratchy teepee away from Mimi. He instantly was more relaxed and starting
napping on the bed. He just wanted his own little territory. He's stopped
marking Mimi's territory, namely my office and bed. What a relief! I just
thought I'd let everyone know that there is hope for a spraying cat. I'm glad I
got professional help. It was well worth the money. It was such a frustrating
problem.