Lee - I'm not asking about how to "read" a dog in the evaluation process. I'm specically asking how you "preformance" test a stud or bitch to elininate dysplastic stock, thyroid problems, deafness, or other gentic issues from your breeding program. What age, what tests, what frequantcys, what durations, what controls, what proofing etc., etc. ??? These are all tangibles I'm asking about. I believe most of the people on this site are quit capible of understanding a straight forward answer to a legitimate question. Enlighten us. :D