I'm not an expert on wild sheep, but I beleive Dall sheep and bighorns are two different things. I can tell you that in my home state of Oregon you have to enter a lottery to draw a sheep tag and you can only get one in a lifetime, also selling of animal parts here is strictly limited by the game laws. For instance a friend of mine had what they call a horn and fur license required by the state to deal in animal parts, He couldn't sell a comple deer or elk rack, ,they had to be split in two. He had a black bear rug which he was not permitted to sell.. A lot of these laws were enacted because of the black market in things such as bear gall bladders which bring big money in Asia.