Will Falconer, DVM Moderator
I don't know, Barbara, but I can tell you it has worked in many who haven't made the leap to all raw.
Hey, my dad was an old school Italian, and he made nice little increments of forward thinking as I kept after him with little things I felt were important. The compost pile behind his garage, the recycling (that sometimes got dumped in the trash, ahem), and my vegetarian diet and meditation practice. So, don't give up on him. Start cracking a raw egg over that kibble. Then a bit of chopped raw liver.
Just quietly remind him that's a wolf in cute doggie clothing that he's feeding there. ;-)