Two of my virtual friends have started breeding Dachshunds and Miniature Schnauzers. And here are some things I've taken notice of them. 1. They will only release the puppies after 6-8 weeks of staying with their mother. This is important as puppies will learn their first dog manners from their siblings and mother. 2. They will ask potential owners lots of questions and will require them to visit the dogs. 3. They screen and refuse buyers if they feel that he/she isn't fit to take care of the dog or that particular breed. 4. They will tell you that in the case that you are no longer capable of taking care of the dog, they're willing to take him/her back. 5. You will be able to see the mother and probably a picture of the father (if not the real one) with their papers ( which mostly includes medical examinations done to find out if they're free from hereditary diseases such as PRA or Progressive Retinal Atropy). 6. They are an expert in the breed and can answer questions regarding temperaments, behavior and potential health problems. 7. The breeding area is clean and sanitized. The dogs are well taken care of and healthy looking. These are just some of the qualities a good breeder has.