Backfist:
Raising a dog properly from puppyhood to adulthood is real good experience in figuring out the "child world". Most of what you have to do with puppies is the same as with kids ( ie potty training, up all night with a cranky newborn, discipline, teething issues, medical/health issues, the terrible twos, backtalk issues, the terrible teens) . Dogs just grow up faster.
Sounds like your breeder is in or around S. Dakota. Here's an excerpt from a/the Boxer rescue website located in Rapid City, South Dakota. Not sure if I can mention their name but you can search under their name if you want to see the entire site.
"If you plan to have a pet that is allowed to run free or live outdoors, please do NOT apply. We require fenced yards, and the dogs can not be off leash unless in a contained area. Boxers can NOT withstand the heat or cold and must be indoor family members. Dogs kept outdoors develop social and behavioral problems. Our dogs want to be your couch potato or foot rest.
Many of the dogs that come into rescue are walking skeletons because they have been kept outdoors. They burn off all their calories trying to stay warm. It's amazing to see the quality of coat they develop from good nutrition, plus how quickly they get to a healthy weight........ "