As a goldendoodle owner I am pretty sure I know your breeder. As far as I know there are 2 breeders that recommend Life's Abundance and Nuvet, one of which is the breeder my doodle came from. I did buy a small bag of the Life's Abundance to get the puppy settled in to our home. It is best to continue to feed what the breeder feeds for a short time as the move to your home might be a bit stressful for your puppy. After a few days or a week, you can start a slow transition to the food of your choice.
I did not love the Life's Abundance as I didn't want to deal with a food I could not pick up locally. What if while traveling I forgot the food or it spilled or another dog got into the bag? I also feel there are better foods out there, especially for the money. I transitioned our puppy to Acana which is also made by Champion, the makers of Orijen. Acana is just a lower protein that Orijen, but with the same great ingredients. As I have a mini, I had no needed for a large breed food, but any of the formulas are all life stage, so feel free to feed which ever formula you want.
If you go with Acana or Orijen remember to keep the UPC from each bag. Champion has a frequent buyer program; it is directly through them, not the store your purchase from. If your store does not have the frequent buyer card, email Champion and they will send one to you. I like that you can buy from any store and still have the advantage of the frequent buyer; I have several store nearby that sell Champion and I don't always buy from the same one.
As far as Nuvet, there is no need for a puppy on a good food to need vitamins. My vet said no way even though I had already decided not to give them. While it will not hurt the dog to have them, it is a waste of your money to feed it to them assuming your dog is healthy.
Have fun with your puppy, goldendoodles are the best!!!