I disagree with that statement
we are finding more and more the calcium protein ratio for some growing newfs needs to be more calcium to protein, feeding turkey necks thru the first nine to twelve months helps support the bones and structural growth, i gave my first two newfs a half carton of cottage cheese a day, every day from puppy on, and both ofa and neither had any trouble.
i think the breeder is the coach and guide to those who buy their pups and must be the one they consult with if they see the slightest form of deformation on the longbones on front legs or any other abnormal growth, becouse it has been seen and experienced that those who develop deformaties at the pastern whhen switched to the necks straighten out right away.