I use the Bichon Information Station for a lot of these things. The essays apply to all dog ownership issues, only a few are bichon specific. Scroll down watch the left column for BREEDER. Those essays will outline many things to watch for.

http://www.bichonfriseusa.com/

Under the TESTING essays, the CERF link isn't working properly, but you can search for CERF canine and find info on that. Each breed may have its own additional tests as well. I am sure that once they get into reading and researching, they can track down any specific tests recommended for Scottish terriers.


Also, if they are not in a rush, they could attend local dog trials, dog agility competitions, etc. and find someone that way as well. Those are the folks who are into improving the breed and even if they don't breed they often know someone who does. (If the competition is APDT, the dogs may be neutered / spayed, not so for AKC competitions. But that is not the point, other than as to why some of those at the meet may not breed.)