You are least likely to have problems if you stick to what the breeder was feeding. I have no idea how many times somebody switches from a common brand to one of the highly hyped brands and the puppy has digestive problems. That is even with the slow switch recommended anytime. I have yet to see any evidence to back the claims of the more expensive foods, http://skeptvet.com/Blog/2009/07/pet...trition-myths/
I haven't seen any good arguments to back wet foods either. Other than being more appealing to the dog, they may do more harm than good, dental problems and overfeeding. Dry foods may or may not help keep the teeth clean and improve the breath. They are less expensive, easier to feed, and very important, it is easy to measure out exactly what your dog needs. How much you feed is much more important than anything else for your dog's health, http://www.longliveyourdog.com/twoplus/RateYourDog.aspx
My puppies usually come to me eating Pro Plan growth chicken and rice kibble. At 4 months I switch them to the all life stages formula. That is recommended for larger breeds to slow growth and allow joints to develop under less stress.
I see many, many other puppies on Pro Plan. When I am with other Pro Plan feeders, there is very little discussion of the common health problems, digestive upsets, soft stools, hot spots, itching, odor, etc. Mostly it centers on eating habits and body condition. The puppies have shiny coats, bright eyes, active, etc. I can't believe Pro Plan and other common brands are the junk widely claimed. I have seen the same fine results with Iams and Purina.,