A significant part of the national pet-food bill these days goes for so-called premium and super-premium varieties. But "premium" has no legal definition in terms of nutritional quality, notes Sarah Abood, D.V.M., a small-animal clinical nutritionist and assistant dean at the Michigan State University College of Veterinary Medicine.
I think the important thing to take from this article is that Premium and Super Premium have no legal definition. Therefore you may be paying more for something that isn't worth it. Reading the ingredients listed and educating yourself is still the best protection your pet can have.