I watch pups from early on.....heck, from out of the sac! Food drive, tenacity, pushiness all can be observed with nursing babies. By the time they are 5 weeks old, I have a pretty good idea who the more dominant pushy pups are, and which are less pushy....By 8 weeks, after doing separation/strange place/object exercises, I know which are going to pet homes and which are staying/working....not to say that "pet" pups are not still capable of doing work...in my As....the "pet pup" as pronounced by a training director of a club, ended up 6 or 7 times Schh3. In G's, the male that was a bit lazier and just a cool personality is several times IPO3 and has V rated in every phase under tough judges. In K's I had 3 males...all three showed signs that said they would be good working prospects...the "pet" home has a very very strong male who is treated by respect by the TD/Helpers in her club...not a sport/prey dog at all, and a force to be reckoned with. But he was the least dominant/pushy of the 3 males....the most pushy is here after being returned when owners had a baby....another board member has the 3rd and he will be titled maybe this winter/next spring.
It is understanding what you expect from the genetics/pedigree, what you have, ie how it is expressed, and what your priorities are in a home. Then it is up to the x-ray gods, and the owners to take that potential and go forward. My Komet was sold to a promising working home...but they faded and as a working couple with a new baby...with the husband traveling alot...they could not do him justice even as a pet and gave him back...if I can get my body to work enough, I will get him titled....albeit he is much more talented than I can possibly utilize competitively...and that is after evaluation from people who have been competitive on a National/World level - not just a breeder's rose colored glasses.
Csabre Sch1, Hexe Sch2, SG Bengal, Lynx, Komet, Kira HGH & Kougar v Wolfstraum ~ Ziberia IPO1 ~ ATB Basha, Kougar & Kyra, Fenja, Sch3s, Cito, Sch2, Danger RH & Alice Sch1s ~Kelsey