I would add a little more of every thing until you dial it in. Dialing a dog to RAW can be fairly difficult as weight loss/weight gain is a gradual process. It takes time. XXX amount today may need to be XX amount next week or XXXX amount the week after until you find the ideal "X" amount for that individual dog. I have been back and forth over the years. I first went RAW with a Rottweiler many years ago. After a gradual change and he was on an all raw diet he lost weight like mad. I began pouring the food to him and over compensated. He gained weight and left food and most RAW is not 'reusable' the next day. So until I matched his activity level to his feed intake and coupled that with his individual metabolism I 'see-sawed' his weight over a couple of months. In time he was better for it but he looked fat then skinny then fat and then skinny and finally he looked fit. Then I got a second dog. Same ingredients but I had to feed her twice as much it seemed because she was a spazz, always on the go.
Long story short, add amounts gradually, and i would say an increase across the board, and dial him in from there. His size, metabolism and activity level will make him different from any other and he has to be fed based on those three things. Best of luck. EWO