Ricky and Lucy Tu came from a breeder by my daugher as a gift to me. This breeder has you come to her home, see her bitch and their home. She only lets her bitch breed three times total and she does not breed them until they are 3 years old. She only sells the pups to people who come with references and she insists that any pup not wanted for any reason be sold back to her. Once her bitches have bred for the last time, she spays them and they stay in her home or go to the home of someone she knows who wants an older dog. She will not sell to anyone who is going to breed, show or do anything she thinks is less than a pet situation. Not to say that showing is bad, she used to show and she thinks it takes a lot out of the pet.
Desi Lu was bought by our daughter again but from a different breeder. Never again. This one did not seem to be as concerned about the puppies from what my daughter said and I have told our daughter not to recommend her to anyone.
There are good breeders but these are breeders who love the breed and are not thinking about getting rich. Ricky & Lucy Tu's breeder only has one or two litters a year and some years, none. She will not breed any female that is too small because she does not want to endanger her. That's one of the differences from a responsible breeder and one that is not.