I health test all of my dogs for OFA patellas, thyroid, cardiac, hips, CERF (eyes) as well as test them genetically through both Embark and Betterbred to ensure the genetic diversity of my pairings. I also show my Havanese in CKC conformation shows.
When raising my litters, I use the Puppy Culture Protocol to ensure they get all the early socialization required so they grow up to be balanced, social dogs. I am far from a large scale kennel. All our dogs live with us, and the puppies are raised in the home with us. My young children (and their very happy-to-help friends) ensure they are exposed to a busy family life from a young age. I only have one or two litters per year, and as such they all get a lot of attention.