i have 2 minpins. there dad was a rare color variety (slate blue/gray) that carried a prevalence to skin problems. some of them were passed on to my little girls (namely some allergies). anyways, i feed them a holistic food called- Solid Gold Holistic
http://www.waggintails.com/programs/solidgold.htm
the food is great, not to mention they love it. it's made up of fish and grains and that is it. i also supplement their diets with a lot of other fresh items that i eat myself.