It is my opinion is to feed my puppy a mix of adult and puppy food until she's a year old. You, and many others, don't like to feed puppy food. Some people are a little perturbed by the price of puppy food and it can be a deterent. Others only feed their puppy breed spcific food. Each person is different, as is each dog.
That is why I suggested a consultation be done with the Vet, or breeder....if there is one.
"Always be a first-rate version of yourself, instead of a second-rate version of somebody else." - Judy Garland