I'm feeding my pup Wellness for small breeds (chicken) and EVO for small breeds (Beef). 2 to 1 = almost a full cup per day, sometimes he doesn't eat it all. Is having a mix of kibble for variety a good thing? Why do I feel like the beef is not a good choice even though it sounds the most appetizing? He does seem to enjoy that one.. thanks guys! Oh, he is about 9 pounds, give or take.