My wife and I recently purchased a house and would like to have some chickens. We found a coop we liked it is 3.5' by 4' with 1 nesting box. The person selling them said that this size was good for 4 birds. We are looking at getting some Buff Orpington's, I just wanted to make sure that 4 chickens wouldn't be to many for a coop of this size. Obviously they will have a fenced in section of the yard to stretch their legs.