Hi Mary W:
I have not had furry friend with this ailment, but I thought I would list a website for you to look into in the mean time while the posters with experience in this illness provide more feedback for you.
Balanceit.com has been suggested by regular posters on DFA. I have it bookmarked in case I ever find a need for this resource.
I have not used their service, but I believe that they will work with your Vet to come up with a meal plan for your pup. They also sell products on the website as well.
It looks like dchassett has asked Aimee to elaborate on her initial post so you should be getting more feedback in the near future. Good luck!!!!
