Well after my golden ret mix spent the bulk of his life on nutro large breed (puppy then adult), I switched him to Merrick Turducken. It's been about 3 weeks now and he is chewing on his paws worse then ever. I bought a bag of the orijen fresh fish adult formula and would like to know how much I should feed him? He weights 78 lbs (could lose a few lbs) and has always ate 1 1/2 cups twice a day on his old food. He isn't super active, he enjoys sleeping most of the day. Is 1 and a half fine to continue with or should I cut it down more since he is on orijen? Thanks