Make sure you evaluate postural changes vs. conformation. Posture can be
changed, conformation cannot but many long-term postural problems (pain,
unbalanced feet, unbalanced teeth) can mimic conformation problems
(goose-rump, cow hocks, etc). I would recommend a good prepurchase by not
only a regular veterinarian but by a veterinary chiropractor too. You
wouldn't believe the things that I find that many regular vets missed.
Kim Henneman, DVM