Depends on the chicken type. You ought to ask local farmers. My father have very aggressive black chickens, a rare breed named after a town 10 km north. 2 of th

Depends on the chicken type. You ought to ask local farmers. My father have very aggressive black chickens, a rare breed named after a town 10 km north. 2 of them do the same damage as 6 factory chickens. And it depends on your needs in eggs too. 3-4 chickens for a family of 4 is enough if you only eat eggs occasionally. My grandmother bought 12 chickens every two years for a family of 3.