If your feeding a diet that your dog is very well on and maintaining it's weight, energy , stamina etc. keep them on it. But... mushers will bait will dog food in order to get their dog/dogs to eat or drink before and after extreme exercise. Working dogs will louse there appetite just as human athletes will do after after daily physical exercise. I like to bait the water before I go hunting using a product called Glycocharge or on colder days a powdered fat supplement National Energy Pak high in calories. I use either of these products instead of feeding kibble and they lap it up every time. Later on after the hunt is over they get kibble sometimes baited with the fat supplement if needed.