I came across this pdf while researching cow hocks, it's about cats but is a great reference for dogs as well. Beautiful pictures, easy to understand, and the end is fun! I should probably post this is the Conformation section but I'd like to put it in a more visible place.
I enjoyed that. Can't wait for Josie Wales to come back inside so I can check out her stance. Rosie looks pretty good to me. I have seen Josie sitting on her hocks at the door, but maybe because she has been there a long time trying to get my attention.