Purina One Pro Plan Large Breed Puppy Formula is a great food for dogs up to 2 years old. I have been feeding it to my year and a half Weimaraner since he was a puppy and he has grown up extremely healthy and has grown above the normal breed size by 20 lbs. His coat has consistently been healthy and free of dry skin. The food also helps to keep his energy levels high and keeps him at the top of his game. I plan on continuing to feed him this dog food until he is two years old and will switch over to the large dogt breed adult formula.