So a second post with links to two more great resources - the Merck Veterinary Manual Online for Veterinary Professionals (
link) and the Merck Manual for Pet Health for Pet Owners (
link).
As always, we advocate taking your pet to a veterinary location as opposed to doing any self diagnosis/treatment - the information contained at the two links provided above is meant only to serve as an educational resource and certainly, we have personally learned a lot about a lifelong medical condition that one of our cats has to live with through the knowledge we gained at the Merck web site.