
All 3 breeds are good workers in their own field. Can't see why you would want the prey drive in the sled dogs really but they do have high prey drive because of being primitive breeds,a nd who knows maybe that is some of what makes them pull well????
With a Husky you have a dog developed to haul light loads long distances, with Mals heavy loads, and Greyhounds are used for racing, but developed to course, being able to turn this way and that at speed, not something a sled dog needs to do.
As for coat, you would be removing the good coat by crossing with a Greyhound.