[Gracy]

I would get a new Vet.
You are not wrong, I can't believe a Vet told you this.
Your Puppy is growing and needs a Special Diet.
Puppies eat Puppy food. Puppy food is high in Protein and Calcium.
Puppies Bones and Teeth development continue as they grow.
About 9 -12 months.
I even feed my Dams, which is advised by ALL, puppy food. From the time I decide to breed her, Until her puppies are weaned.
Toy dogs especially need to be on a high protein diet.

I have one of Lily's pups right now. He is 14wks and will keep him on puppy food at least till he is a year.