Our breeder fed Beastie Eukanuba and Bil Jack, and suggested we do the same since he was a good eater (3.5 pounds at 12 weeks). Got him home, and continued this diet. He hated the Bil Jack, so we stopped that. He does not seem to be wild about the Eukanuba, but he grazes on it all day and has gained .5 pound since we got him 5 weeks ago. The vet said she was pleased with his weight. Soooo, while I feel like a bad mommy for giving him the "Yuckanuba" and would like to try something he (I?) might prefer, I'm not gonna argue with success.
This doesn't stop me from reading every label on every brand on every trip to PetSmart.