Info regarding Chicken growing contract

Hello Everyone,

Myself Maruthi, I am from Karnataka, Tumkur District, I heard about Big Chicken supply companies are contracting through farmers for growing chicken. They provide all basic necessities like chicks, food and medicine for farmers and buying back fully grown up chickens after 30-45 days and paying some commission amount to farmers. I want to know more details, factors about it and also experiences about this business are most welcome. Also Pros and Cons are expected.

With Regards,