
In numerically small breeds most breeders belong to their national breed clubs and tend to rely on puppy enquiries via contacts from the breed club site/secretary or breeders own websites.
These days many breeds will have Facebook group communities.
My own breed has a breed club group, and an older GB group that is full of the whole breed community from pet owners to exhibitors and breeders. Our own groups have members who arrange to meet up for group walks.
Most breed enthusiasts and breeders are more than hapoy to have people meet their digs, and on the group pages share experiences and advice.
With advances in genetic knowledge most breeds now have some breed specufic health issues that there are DNA tests for, and of course there are the long established hip elbow and eye schemes.
Most breeds should at the very least be Hip Scored andd have clinical eye tests.
You can find out what tests shiuld be carried out priir to breeding through Kennel Club pages and the relevant breed clubs.
Avoid any breeder that does not health test.