Actually, and I do apologize, most of the food information is in the Health Section.
Instead of making you search through there, check out the website dogfoodanalysis.com. It lists all the different types of food, and rates them from 1 to 6 stars.
I would recommend choosing a food, designed for a puppy, that has a 3 star rating or higher.
I just looked and found one of the discussions regarding feeding young pups. Richard (Nileska) is highly experienced, and has attained an age that affords him a wisdom most of us yet to acquire.
Here's the link:viewtopic.php?f=5&t=5953
You may also wish to start a thread or two of your own, if you don't find answers to questions. Use the Behaviour and Training Section for things like housetraining, and the Health Section for diet, vaccinations, spay/neuter and other questions of that nature.
I'm sure some of our other members will be along to provide other links, and/or give direct information. I hope this is helpful to you.