How Many silkie chickens could I fit in a 20' x 20' chain link fenced in area? I was thinking of getting 3 - 4. Also , any advice on furniture? ( Tarps,coop style, waterer, ramps ) We are fencing in another section of our "pasture". It is covered in grass, trees lining the inside of one side and the grass is slightly higher there. Shade comes in from both sides though because about ten feet away from the enclosure is a large clump of tall trees. All advice and pictures are greatly appriciated!