I wouldn't fee Authority...come to think of it, if you can help it, I wouldn't feed anything that is available at PetsMart anymore. I feed California Natural dry food to Tango at the moment as well as some canned California Natural or Innova, but will probably try Innova dry next time. She's doing excellent on the CN, I've never seen her healthier. She eats a little over 2 cups a day and I only have to buy her food about once every month and a half or so. It costs me $53.00 Canadian, and I think it's a bit cheaper in the US. The other 3 eat Canidae as Winston wasn't handling the CN very well (it was too rich for him I think). They are all doing very well on Canidae...it's about $48.00 here for one bag, I'd definitley recommend it.