Experience and Know-How
Don't be content to follow a routine. Anyone can follow cookbook instructions. Learn all you can about physiological functions, nutrition (feed and water), ventilation, and stress factors of the broiler chick. By doing so, you will understand in greater detail the contractor's requirements in your grow-out program and will be more successful in producing broilers.
Learn as much as you can about the company with which you are contracting. You are a vital part of its operation. Know what the company's overall objectives are, what kind of product it is trying to market, and the challenges it faces in getting that product into market channels. Learn how you both can work toward your mutual benefit.