Original sentence: By using chicken tractors, flock owners are able to raise poultry in an extensive environment, where the birds have access to fresh air, sunlight, forage, and exercise, which caged birds in commercial houses do not have
Edited sentence: By using Chicken tractors, flock owners are able to raise poultry in an extensive environment, where the birds have access to fresh air, sunlight, forage, and exercise, which caged birds in commercial houses do not have