JMC, I'm feeding my cat wild pacific canned salmon AS an
anti-inflammatory, from its high omega 3 content. You might try that.

This is a bad idea and you should stop feeding your cat canned salmon.
Fish is high in magnesium and is thought to contribute to urinary
tract crystal formation. Also, the cat probably isn't eating enough
quanitity of salmon to offer any kind of Omega-3 benefit. An Omega-
fatty acid supplement might be helpful, but it should be one
formulated specifically for cats. One brand that is very good is
Eicosaderm. Countrysidepet.com has a good price on these.

You should read this artlcle about managing urinary tract issues in
cats:
http://community-2.webtv.net/getcathelp/urinarytract/

A good diet you might try is Nature's Variety raw
(www.naturesvariety.com). A high-protein raw diet tends to acidify the
urine naturally and might be helpful to you. Feeding raw takes a bit
of care, but it's not difficult. I feed this brand myself with great
results. If you have any questions about raw diets, please email me.