Ok, I just picked up my dog today who has been in the vet's since Monday, and was diagnosed with bad kidneys. I was told that he will have to be on this special diet for the rest of his life, so they sent me home with this Hill's Prescription Diet K/d food, that is only sold at the vet's office for a whopping $60 a bag (40lb). I used to feed him Authority which was only $24, so this is quite a major gap in pricing. Also, the cans of wet food are sold for $1.75 a can. OUCH! I was wondering if anyone knew of any other brand of dog food that had the same kind of special diet plan for kidneys.