put your blade of the knife on the inside of the skin and solely penetrate the skin while cutting
you will cut hardly any hairs . . .
just like when you gut the deer
When I am casing out the legs, I fully pull the skin down past the knees and then cut the bone below the knees with a bone saw. Then on the floor I cut the hide free from the attached legs. All the leg hair stays away from the meat.
Same here.