A number of MacFarlane Pheasant's ringneck pheasants wander a pen on the company's farm in Janesville, Wis. The tent-like structures you see when you drive along the Highway 11 bypass south of Janesville are pheasant pens made of netting. Each pen is about a half-acre in size and can hold as many as 1,000 pheasants. The pens are planted with tall, hearty weeds and seed corn, which make good cover for the birds. Pens contain automatic feeders and waterers as well as boxes where some birds hide. Most of the pens contain adult ring-necked pheasants that were hatched in the spring. They will be crated and trucked to game farms across North America.