i feed my lab pmi I get it at the feed store next to holliers in sulphur.
http://www.pminutrition.com/rf_brand.html. I feed him 3 cups a day and use the red flannel PRIME during offseason and put him on PMI Exclusive during hunting season the 30/20 mix. If he starts slimming down I feed him a 4th cup but never more.