Ask how many generations of dogs they have bred.
If she has been breeding for years and has NO kennel name females for 2- more more generations something is odd.
Normal to use outside studs but not normal not to want to create your own line of PROVEN dogs..
Being proud of what you create is one sign of a good breeder.
The more generations they have the more they know about what genetic issues are in their lines. IF they claim all dogs are perfect they breed . Head for the door,. The only perfect dog is a stuffed animal.
The other list posted was perfect ..