First, some chicken breeds with strong market competitiveness will be selected for free-range, such as pheasant, princess chicken and other ecological chicken breeds.
Second, the problems of water diversion, sanitation, protection, wind, sun and rain must be considered in the mountain environment.
Third: purse seine problem. As 1 Lou said, 2 meters high is just an ordinary chicken breed. If some chickens, such as pheasants, fly more than 2 meters high, then we should choose the purse seine according to the variety of chickens.
This is basically three. Have a good time raising chickens.