
There aren't any actual KC registered breeders as such, there is the new KC Accredited Breeder Scheme & breeder who have been granted a KC affix but it only the accredited breeders who the KC require to fulfill their criteria for good breeding practices(if you go
here then to the dog register(on the links along the top of the page & then there is a link to the new scheme on the left))
Sadly because the KC register the puppies does not guarantee their health etc but you can check to see if all the health checks have been done
So sorry that your golden had heart problems a Golden Breeder in the next village bred her bitch with heart problems 6 times & in every litter she produced affected puppies The bitch died aged 6 & she is now breeding from one of her daughters <sigh>because they are the popular very pale Goldens she has no problem selling them ! No eye, heart or hip tests done & the sire is a Golden who lives in the same village each time & for the daughter she has gone to another pet dog in the next town
I would advise you to go via a breed club that has a code of ethics for their members who breed(which most clubs do)at least that way you will know that the checks etc have been done, which is all any breeder can do as well as researching the pedigrees
Most of the Flatcoat breeders are responsible & they are not as over bred as Labradors or Goldens, saw a nice one at the show on Sunday