unprotected wildlife

Hunting with ferrets

I am curious about hunting with ferrets, as they have been bred in Europe for that purpose for centuries. Would it be lawful to use ferrets to flush cottontail rabbits? How about upland game birds? If not, would using ferrets to hunt unprotected or predatory wildlife, such as jackrabbits, be considered legal take?

Can one take predators or unprotected species with any weapon in a "short range" weapon only area.

While hunting for big game (Elk) in the Snake River Zone with my pistol we have come across coyotes. However, since we were in the "short range weapon only" area we decided not to take them.
Could I have used my rifle (22-250 or 243 rem.) to take predators or unprotected animals at that time, or for that matter "anytime" while in this zone?