Thank you to Tina Barber for allowing us to reproduce this chart - taken from:

Characteristic Backyard
Puppy Mill Commercial
Experienced Breeder
Has a specific breeding goal To Produce puppies To Make money To supply the demand To better the breed To perfect a specific type to leave a legacy
Belongs to and works with breed clubs May masquerade as a member Hardly ever Has a network of business contacts Extremely dedicated Very active, generally an officer
Understands and breeds to the standard May not even know what it is Not interested in breed improvement Does not specialize in a specific breed Invites knowledge Is a mentor, writes books/articles, conducts seminars
Active in dog related activities (shows, trials, rescues) Often rescues only to attain more stock.  Rarely attends shows or trials Does not need to promote establishment; sells to brokers, pet shops, etc. Does not need to promote establishment; sells to brokers, pet shops, etc. Shows and trials to prove worth.  Shows and trials to objectively test breeding stock Often judges, provides seminars, writes articles and willingly mentors serious Hobby Breeders
Knows the true history of the breed May share false/incomplete info Often pretends to know some Claims that it's not important Studies continuously Impacts the breed for many decades
Sells pets with spay/neuter contract and tries to stay in touch with new owners May charge more for "breeding papers" Often issues papers via generic "registries" All pups sold have full breeding rights Yes, and diligently follows up on progeny Always differentiates breed/pet quality and insists on frequent updates
Keeps up with health and temperament issues affecting the breeding and provides in depth guarantees May refuse to acknowledge problems.  Considers shows and trials as too political No need to, mostly supplies brokers and pet shops Meet minimum standards as required by law Goes above and beyond standard requirement Maintains a solid support system - accepts full responsibility for every puppy produced
All breeding stock is tested for genetic diseases affecting the particular breed Some occasionally may be to impress consumers Only as demanded by consumers - may give papers as proof of quality May provide undocumented paperwork for appearance sake Intensive testing always a priority Often initiates club sponsored seminars and clinics
Maintains carriers records on all dogs in gene pool including effected progeny Focuses mostly on phenotype-unfamiliar with genotype Often supplies broker and pet shops, records unavailable Dogs and puppies are often auctioned off in lots, records unavailable Attempts to continuously track every puppy produced Bases entire breeding program on extensive gene pool data
Clean, sterile environment always maintained Conditions may vary greatly depending on available income Often tries to maintain minimum standards Cleanest, best organized; state inspected Usually "home raised with love" and well cared for Often cluttered but always healthy and mentally stimulating
Expected longevity with any particular breed Unrealistic expectations - easily disillusioned Will continue as long as sales are coming Depends on popularity of specific breeds On a mission - plans to stay for the long haul Involved with the breed/breeding for decades - make a lifetime commitment