Mixed Chicken Livestock
Chicken livestock that live in the daily live can be mixed derivatives from many kind of chicken that available on that area. The result mixed actually varies sometime good but sometime bad. Good chicken derivatives can stand for longer life and breeding with many kind of chicken too, bad derivatives chicken often time dead faster than the normal age naturally being eliminated, even though sometime could have offspring. This bad derivatives will naturally eliminated again until of them are finished.
Those natural system make selection for good properties of chicken, that is why domestic chicken more resistant to diseases attack, because this chicken have passed those selection system. People create or select the properties of chicken from one or two goal, like to select chicken that have many egg production or chicken for meat. But unfortunately people have difficulties to select chicken with many good properties, because have a huge parameter that interact each others. People just select chicken with one or two goal properties, then they must conditioning the need of chicken to live, this condition make farmer sometime have difficulties make chicken breeding from that kind of chicken.
