Here is the best part this site does the work for you
Your Health Screening Information for Your Listing
Only ads & renewals from breeders who practice Health Screening of their breeding stock, with verifiable results, will be accepted.
Yes, I conduct Health Screening of my breeding stock.
My results can be verified:
Online (CERF, OFA, and/or CHIC)
By copy (scanned or paper)
This website is great as a link to some great breeders, but I would still take it with a grain of salt, as on that page I see two very questionable red breeders on there. It doesn't check for things like how many litters this person breeds, and seems to accept a certificate from a vet stating this dog does not have Hip Dysplasia as a health testing proof.