I feed the nutro natural choice lamb and rice small bites to Harley and whenever he starts to show a lack of interest in his food I just pour his kibble into his round kong and he goes crazy. He loves to work for the food, to roll it around and get his breakfast like a pro. Sometimes just making the food into a reward for playing a game can spike their interest. If he's still not all gung-ho about it I'll just cut a slice out of his natural balance lamb roll and add those bits to the ingredients too. And that will ALWAYS do the trick. You should try it