I love questions where I get to learn too -- I looked around and found these pages that might help:
Here is an example of the "up-on-leg" phrase: "The rapid rate growth during this time can cause many puppies to develop awkward uncoordinated bodies. To make matters worse, different parts of their bodies can develop at different rates. One puppy's legs may develop before his chest, giving him an" up-on-leg" look; he may walk around looking like he is on stilts for months before finally filling in. Another pup may develop his forechest early; this may cause a low- to- the ground and "dumpy" look until his legs catch up."
http://www.doralpub.com/doral/EvalPup2tip.html
Check out Pet Orthodontics here:
http://www.dentalvet.com/patients/or...thodontics.htm
"In dogs that have a short, wide muzzle, a reverse scissors bite is considered normal where the lower incisors are in front of the upper incisors. The lower canines and premolars will also be shifted forward. While the reverse scissors bite is an acceptable breed standard, at times the upper incisors cause trauma and pain to lower jaw tissues."