I was told by my vet to feed as much as they will eat, I have to say I don't agree with this.
Yes they are using a lot of calorie at this age, but I thought let's not start off over feeding as it could cause issues with weight later on.
He may just be really enjoying his food or is a hungry pup, the feeding guides on all food are just that, a guide, it depends on what your pup is filling there day with IE Zoomies or Sleepies!
It's not always easy to see if they are under or over weight because of there fur, I asked the vet to check my girl out for me ( I'm no expert!)
Can't find them at the moment but there are a couple of great threads on how to check if there weight is OK, what to check for etc.
I've not used this food and am no expert, hopefully someone who has will be along soon.