I have been using email to pre-screen breeders on my list, for example if they mention testing on their website but don't go into detail I email and ask what type of testing is done. If they do the appropriate testing then I follow up with a phone call. Some call back, others don't.OK good I can post now... I would like to chime in here as well. I have been in contact with EVERY major, professional breeder in florida. I have only had 1/2 contact me back. It is frustrating. I want a pet but, I want show lines and ALL testing done beyond normal vet visits. ( That detail alone knocked alot of the breeders off my list. ) Liston boxers is in process of breeding their bitches this week, she only breeds in winter time. But, that is a 6 month wait for the pups and she has a waiting list a mile long. I spoke via email to garnsey boxers they advised last week that they had pups. I started asking questions and the emails stopped...... So I know " frustrated ".
We are seriously considering a rescue, too. It will probably take a few months but that's ok because we were prepared to wait anyway for a puppy. Good luck to you.