There's never enough chondroitin/glucosomine in dog foods.
My girl get's 1000mg's a day, I believe Jamieson makes a kind, 280 pills for $25. Definitely supplement.
I feed the same food to my guys, although my pits almost a year. I believe it's for all life stages though.
Most breeders don't feed puppies "puppy food", too much protein and fats from what I've heard at least.
Someone will post eventually with more specific info
LOL