A mobile cart for isolating an animal from a herd has a protective enclosure for housing an operator and the animal, and for concealing and protecting the operator from the herd. The cart has several modes of operation including a drive mode allowing the operator to move the cart toward the animal, a capture mode allowing the operator to capture the animal within the enclosure and conceal it from the herd, and a treatment mode allowing the operator to treat the animal within the enclosure before releasing or moving it elsewhere. In the capture mode the carts front end may be lifted over the animal to trap it, or a gate may be raised to bring the calf into the enclosure, or both. A rear end basket for holding the captured calf has a screen with multiple positions for controlling visibility into the basket and enclosure.
