I don't know which one is the best. But whatever works best for Jasper, then go with it. Jasper's health is the most important thing!!!

Like for Gigi...a lot of people say Chicken Soup for Pet Lover is great. Gigi tried it, but it just makes her itch and her stool soft, so that won't work for her though tons of people say how good it is. Now she is on Royal Canin and it works fine, so I am sticking with it.

I know I am not much help. Oh well.