Details of Contract farming Integration with Broiler- Breeder,Hatchery,Feed-Mill with companys like Venkys,Suguna,Srinivasa,

Hi Experts/team, Can any one help me with details of Contract farming integration of Broiler - Breeder ,Hatchery,Feed-Mill Contract farming with company's like venkys,suguna,Srinivasa,IB....etc what is the process can any one let us know the process.