If there's one word in Powder Valley's cattle country that makes the locals' jaws clench and trigger-fingers twitch, here it is: sheep. But easygoing Jason Sweet won a trainload of sheep in a poker game and he aims to graze them. And rolling, green Powder Valley looks like the perfect place. In the year he was named the top male box-office draw, Glenn Ford strapped on his sidearm and his sense of humor to portray Jason. George Marshall, who showed how the West was fun in Destry Rides Again, directs Ford, Shirley MacLaine, Leslie Nielsen (as the villain) and more familiar talents in a tale that combines genre sendups with showdown heroics. The Sheepman: Smile when you say that, pardner!