i raise my pups on bonnie puppy until 6 mths and then change over to adult.the pup i got from a breeder that was using nutro puppy had the worst legs and he is growing fast-65 cm at shoulder(7 mths) we feed minced chicken carcasses,wings and frames,lg bones once a week.funny enough,the pup with bad legs started to straighten up 4 weeks after being on adult food instead.