none it's not nice to the dog to ride on it's back for you could break it's back bones.
but you could mean sled dogs or normal dogs so you may want to rephrase your question
A Scottish Terrier.
Probably the best type of dog is a Labrador Retriever.
English bull dog
A blood hound is the best hunting dog because it has a great nose & it also runs fast.
German sheppards
dog
It depems on what u want but i think a dog is the best
Whatever dogs the breeder knows best about.
I'm not sure but I know my dog loves to ride with me!!
none obviously
dachshund
A hungry dog