i'm not offering a recommendation either way , but i assure you there is science behind large breed puppy foods , actually the same science everyone uses to judge other foods on ...... i can't speak on the newer foods like orijen , earthborn , merrick , i've seen some that seem to not follow the science , why i don't know , perhaps those are just marketing , dog food has become ultra competitive , and no one is actually going to base their opinions on anything more than how they feel about it , i can't imagine many folks are basing their opinions on orthopedic results ....... i am certain the older large breed puppy foods do adhere to the science , if you compare orijen , earthborn or merrick all life stages to eukanuba , diamond or purina large breed puppy , or any of the established older large breed puppy foods , you'll find the large breed puppy foods are lower in kcal per cup , the calcium phosphorus ratio is correct and they are lower in fat .......