Consisting of crowding tub, narrow alley/chute with headlock, and outside fold-down work platform, a Portable Cattle Crowding Tub and Alley allows a farmer/rancher with physical impairments to work his animals from a safer position and at different locations. Once a given number of animals have been herded into the curved crowding tub, the tub's swing gate is closed, forcing them single-file into the alley/chute, at the end of which is a headlock to restrain the first one. Standing on the platform just outside the alley, one carries out the needed activities (e.g., ear-tagging, administering shots). When finished, pulling a lever releases the animal just worked and automatically restrains the next in line.