The system the packs have on breeding is easier because they all take up hunting in the same manner(run to catch). If you study the pedigrees tho...you will find they typically run through two or three bitchlines and these are all inter bred as proven through sucessful past blending of the blood. There are lines that blend well together and those that don't. You won't see a master who doesn't dig out his stud books when looking at a purposed breeding, they all will run the stud books back to see the correct blood is being joined...
Seriously, I take a different approach than most. I could write a long book trying to explain it, but to keep from boring everyone I'll give you the simplified and shortened version.
). We keep pups from the ones that turn out the best for us. Winter is when we evaluate who gets to carry on the line. The ones that perform best running hare in deep snow, old hard crusty snow, temperatures well below zero, day after day are the ones that we keep pups from. Very few pass the test.