Hi again,
I too have used Prozyme and have found it an excellent product for some dogs. It really is worth a try, but (why is there always a but?) would always suggest that if it does show an improvement in the dogs health then diet could probably be adjusted to further effect. Fresh veg and plenty of it, if not readily taken try mincing it. Try to cut down on processed foods and go for fresh and raw wherever possible. If Prozyme is helping it may also be worth having a blood test done to check pancreatic function. Not that you need another problem!
Thanks for your good wishes and just keep imagining how good it will feel when you hit on the right solutions for your dog!