You want to run a high protein diet so your dog recovers quiker and has more stamina. A higher fat diet does increase there nose but not drastic enough to switch. I have pointer and I have hounds. I keep them on a high protein diet while hunting cause there always running. If your dog gets tired after a hour or two hunt then it would hurt to go to a high fat diet. My dogs hunt hard from sun up to sun down I have a setter and a pointer that you cant tire out and thats the truth... There on a high protein diet so I can hunt and run them day after day.... jmo