www.offa.org hips elbow eyes
Canine Health Information Center Chic organization
Pennhip
PennHIP Home
The heallh databases - please note relatively few Yorkshire Terriers have posted health results.
You can inquiry by registered name of dog or kennel name or registered AKC number.
Any breeder worth their salt should be able to give you a seven generation pedigree.
Be aware that LP is very very common in this breed - LCP is on the rise - LS and MVD are also quite concerning
Be aware of the pre breeding health screenings that should be done.
AKC has always been quite helpful when I call to find out some pedigree lineage
Be aware of where the Partis are shown - because they can not show at AKC other clubs such as UKC (I think) might allow them into their rings.
And try to find the most seasoned 20yrs or so knowledgeable Parti breeder to help you sort through the pedigrees.
Seek out a reproduction specialist
American College of Theriogenologists and get your gal examined by a specialist and testing done to see if she is healthy enough to be bred.
You need the whelping history of all females back in your line - the further back you can go the better. Free whelping vs C sections - litter survival rates. Litter sizes
The pre breeding screening tests could cost you easily $1000 can be done cheaper if you go to a health clinic run at a dog show. Eyes are quite common sometimes heart and ears are held too.
Finally in terms of pics - I would like better to see a video of each dog pefereablu on either loose lead or free moving as well as suspended stack shots - free stacking / no hard stack
Ax I said quite a lot to know and learn.