Not had dogs, but cats... which can be even more food sensitive.
The recommendations above for the premium foods are really good. I used to just feed Meow Mix... but read a really good (long) article from a vet on the benefits of premium food. And a mix of wet and dry. And roast chicken on top. Not a lot... but some.
The biggest thing I see with dog food ads/etc. is massive over-feeding. The Farmers Dog commercials showing a dog getting an entire quart-bowl full of food... Huge portions. The biggest thing I see with pets is over-feeding and pet obesity. It's real. People look at the TV ads, not at caloric intake, food volume and their pets weight/health.
Cat regimen (Take it for what it's worth) is morning and evening meals. Top quality cat food. But I mix in a bit of Meow Mix (my vet described it as potato chips... cats love it, but its nutiritional value is horrible. BUT... they like it. So adding a 'bit' to the mix can't hurt! On top of that, they get Hills or similar premium Wet food. About a half-golfball-size portion. Then a piece of roast chicken thigh about the size of half a golf ball... chopped fine. And sprinkled on top. Twice a day. And treats at bedtime. More ritual than nutrition. Weight is good. Health is great! No over-eating. About once a month, they split a can of tuna in water. As a treat. That is tiny portions with each meal. Between three cats, a can of tuna lasts about 4 days. A few 'flakes' in each bowl morning and night. Just a treat.
And water. Lots and lots of fresh water. Never let them run out.
One cat is really picky.... he is also a 'scarf and barf.' So I always take his bowl away from him before he finishes. And then give it to him as a snack a couple of hours later. That eliminated 90 percent of the scarf and barf.
Again, not going to speak to the dogs, because there are folks here who are WAY more versed in dog feeding and raising. But I would say that the most important thing besides choosing a food that is good quality is portion control and watching for signs of obesity or weight gain 'after' they reach adult size. Kittens and puppies are different, growing and need a lot of calories. But as they transition to adult age... watch that weight. And remember that the advertisers are looking to show owners giving pets huge piles of food!! To sell more pet food. Read instructions. Get measuring cups. Calculate calories if you need to. And don't let them get over-weight because that will be massive health problems and vet bills.
If I can find the article by the vet I'll post it. She did an awesome job. And pointed out that the 'delta' in expense between cheap food and the best food is not huge. And that a couple of vet bills caused by problems (esp. kidneys in cats) wipe out all the savings you may have 'saved' in the cheap food.
Take it for what it's worth... But good on you for researching the best path for your new puppy!!! I am sure there are folks here who will guide you really well! Some bird dog guys especially who have some beautiful dogs. A couple of which I have hunted with... will be great help!
Cheers and congrats on the new puppy!
Sirhr
Edit: This is the article that totally changed my outlook on cat feeding.
https://catinfo.org/ I'll see if she did one on dogs! And as I write this... one of my cats just helped himself to my water glass sitting on the table next to me. Fine. I'll go clean it and refill it. Not going to stop him from drinking his fill because it's the best thing for him. Little bastard.
Edit 2: DId not find another piece by Lisa Pierson DVM on dog nutrition. But a search took me to this site and some really interesting links. Keep in mind, this is a pet food site. But there are several links to articles that look like they might be a big help!!! Again, I really recommend the Pierson article, even if it's not dog-focused. There is so much good material there!!!!
https://www.thewildpetstores.com/content/nutrition-in-veterinary-education