Forgot to add these to my initial post!
This link is the 1st article in a 3-part series on pain management, by Christie Keith. Well-researched and well-written.
Pain Control in Dogs and Cats: The More It Hurts, the More I Hide It
Also, this is her excellent article; "Adequan: A Near-Miracle for Dogs with Arthritis".
Adequan for Dogs
Hope these articles will help you -
kathy