probaly huskies because they like the snow and some times are bred to sled race.
Alaskan Malamutes and Siberian Huskys.
German Shepherd
The good dogs to have a pack with are Newfoundlands and Saint Bernards.
by being good at playing it
friendly dogs, like labradors and goldens
Certain breeds of dogs make good companions to children with handicaps. Golden Retrievers and Labradors are favored as assistance dogs.
American bull dogs like pit bulls are in the bull breeds category. If you raise them properly they will be good dogs.
Thoroughbreds are often what are thought of most when thinking about racing, but there are racing for other horses like standardbreds, which are used for trotting or pacing races, quarter horse races that go over a quarter of a mile, Arabian racing, appaloosa racing, even mule racing! Many breeds are used for racing.
personally i believe that only some breeds of dogs need nutrition.
there is no such thing as the worst dog breed! a breed is a breed and some breeds of dogs are used for specialized things and are better at thing then other dog breeds like your working dogs like kelpies are good for agility and then you have ur German shepherds which are good attack dogs. things like that
Drug dogs in other words dogs used to sniff out drugs can be many breeds of dog. Drug dogs are often dogs with very good sense of smell. Most commonly a German Shepard, however, many other breeds can participate in "drug sniffing". For example Bloodhounds or Labs are sometimes used in airports. Also Bloodhounds can be used on a paralegal case simply because these dogs can sniff out trails hours after they were left. There are also breeds of dogs which can sniff out mold in walls and such. I hope this answer helps it's viewers!
In terms of speed, Whippets, Pharaoh Hounds, Afghan Hounds, Border Collies, Collies, German Shepherds, Salukis, Airedale Terriers, Belgian Malinois, are among some of the fastest dog breeds, in no particular order. But, in terms of trainability, I would not suggest the Afghan Hound, as it is considered to be the least intellectual of all dog breeds.