One should reward the breeder that cares about the future of the breed. One who breeds to the standard and offers their dog's up to be judged in competition with other dogs by experts of the breed. This type breeder is in contrast to the byb who most likely doesn't understand the standard or how to interpret it and doesn't offer his dogs to be judged as breed worthy by experts of the breed.
The byb is driven by profit, while the show breeder is driven to improve his lines.
The show breeder will be familiar with the dogs in the pedigree, often having bred most of them. He will know the health of the pedigree and how to breed with that knowledge. The byb won't know the dogs in the pedigree or the health of those dogs. Even if he has some health knowledge, he won't know how to use it.
Imo, your odds of getting a healthier puppy with a knowledgeable show breeder who does the health testing is better, just no guarantee. This is especially true with diseases whose mode of transmission is not understood.
A rescue, tho often wonderful dogs, are a complete unknown. Which way a person goes depends on how they can live with uncertainty or worry about the next day. Some can live life one day at a time and others not so much.
If I were you, I would want recent liver and kidney values done, too.
The more health tests that are done before the breeding, the more knowledge one has of that point in time.
Hopefully, I would want heart issues or producers of heart issues to be in the fifth generation minimum of fourth. Avoid lines where dogs die of cardio generation after generation.
A decent, tho not perfect research tool. Dobequestog Search Page
A health test research tool, only if owners pay to be listed. http://www.ofa.net/index.html DPCA | The Doberman | Health
Buying a doberman: https://dpca.org/BreedEd/articles/43...erman-pinscher