I use the Wellness, chicken, but same deal with my girl. She looks longingly at the bowl for more yummy food. Like yours, my dog is very active. I feed her 2 1/2 cups 2x daily, I also mix in half can of wet food. Feedings should still be based on weight, and activity levels. If she is very
active you might could add a 1/4 cup to each meal. Or try adding a little wet food. But, it is very important to keep your dog at a healthy weight. =) It'll take a few weeks for your dog to adjust to the new product, feeding him more than he's used to might spawn an over eater. And it's also important to remember that him wanting more is a good sign he likes it!! Dogs will eat and eat and eat and eat if we let em!! Use good judgement, for lower activity days reduce the amount by 1/4 to 1/2 cup. They're nice for training rewards too, so keeping a pocket full of em never hurts!
Hope that offers you something.