Sounds like a reputable source. yeah.
Yep. People are also not taking genetics into account. If you obtain a "pure breed" from a less than reputable source (puppy mills, pet stores, casual "backyard" breeders, etc) you are asking for health issues from inbreeding, i.e., certain types of cancer, hypothyroidism, eye problems, etc. People always ask me where I get my dogs because they are always so healthy and active. As far as Labs and retrievers go, my pat response is "find someone who is hunting their dogs and get a puppy from them". The bloodlines will generally be much better and more diverse than someone who is showing their dogs. Hunting dogs are bred for intelligence and temperament. Show dogs are bred for looks. Out of the dozens of dogs I've had over the years I have never had any major health issues with puppies I got from hunting stock. Certain breeds also are more prone to health issues than others.