In Alberta, MSs of cowboys trapping cows in crib, tagging ears, releasing cows. HAMLS of corral, cowboys on foot driving cows inside corral, trapping them in crib, tagging ears. Two takes of cowboy pulling lever to close gate of crib and immobilizing head of cow. Two head on shots of cows moving through narrow chute, entering crib. Several shots of men trapping cows, tagging them, releasing them. View of several men filling horns of cow.