Have you looked through this thread?
Things to look for in a 'Responsible' Breeder
Health certifications and titles would be high on my priority list, I wanted to see proof that health tests were done and that the parents and grandparents hopefully at least have been worked and proven to a outside judge in some venue
Jasmine - Female Miniature Poodle - born Aug 15, 2010
Loker Delgado Von Stalworth - Male GSD - born Jan 26, 2012
Koda & Zazu - 5 year old male cats
Alex - Male Cocker Spaniel (rescue) - RIP Cuddlebug 2007-2010