At what age should I switch from Puppy food to Adult?

[MomOf7]

Looks like you have a lab...Labs start major growing spurts at 6mo I would switch to a large breed quality dog food. I use Nutro Natural chicken.
What happens is labs have a tenacy to grow too fast on puppy food and have joint and ligament problems. I would also keep his exercise minimal or at least no more than usual. Try swimming as its low impact and really builds some nice muscles on the front and back end. Swimming makes for a strong lab with endurance.

[Zipsmybaby]

I agree with Kblaiz, when feeding a food formulated for a large breed puppy it will have lower amounts of protein and fat as well as a lower calcium and phosphorus ratio but still have the calories to meet the needs of a growing puppy. If feeding a formula for breed size they usally recommend one year of puppy food unless they are giant breeds then two years.