My point was that no matter what you are trying to breed, it is a large investment of money, time, and a lot of learning and study to do it right and well. My dogs may be show lines and his sled lines, but the underling principles are the same. The OP will need lean, well built dogs to be able to run and pull a sled. Good sled dogs have deep, well defined chests with lots of room for its lungs, but not so wide as to interfere with its legs while running. Their shoulders should be well sloped for power and traction, their topline should be straight, their gait should be smooth and effortless, and the perfect sized dog weighs about 45-60 pounds. This weight requires the least food for high speed long distance running. I don't own sled dogs, but even I know those traits are key to a good running dog. Without knowing what to look for in a quality dog, how can you then breed quality pups? Research what the currently winning dogs look like, what breeds they are, and ask good top mushes questions, before jumping into something that you may possibly regret later.
Breeding dogs or any animal is a responsibility and commitment. You do not want to breed substandard dogs, or dogs with diseases and problems and then sell or use those dogs. This is the 1 way that issues such as hip displesia and other issues are perpetuated in breeds and lines. Does the OP know what diseases are common in his chosen breeds? For pure bred siberians (my chosen breed) cataracts are common, epilepsy can affect some, hip displesia is rare, but can crop up from time to time, and there are others. Knowing the dieases that affect his breed is important, as is knowing the lineages of the breeding dogs. Then there is the training aspect of sled dogs, which the OP is asking for advice on and that is a great start. But before breeding I would advise training some dogs first to make sure this is truely what the OP wants. Truely good sled dogs do have good blood lines, training, and upkeep that costs a lot (in both time and money) to maintain.
