i have a good recipe that the corgis might like it's called Bad Breath Banishers
2 cups brown rice flour
1 Tablespoon activated charcoal (find this at drugstores, not the briquets!)
3 Tablespoons canola oil
1 egg
1/2 cup chopped fresh mint
1/2 cup chopped fresh parsley
2/3 cup lowfat milk
Preheat oven to 400F. Lightly oil a cookie sheet. Combine flour and charcoal. Add all the other ingredients.Drop teaspoonfulls on oiled sheet, about 1 inch apart. Bake 15-20 minutes. Store in airtight container in the refrigerator.
i've not tryed it yet i found it in a dog treat website http://www.bullwrinkle.com/Assets/Recipes