Please.... We have 5 chickens from last year (our first chickens). We built a beautiful coop 4 x 4 x 4' high with attached run which is 5 x 4'. I want to get 2 or 3 more babies. I know that the chicks would have to be grown before introducing, but I'm concerned about the fall and winter and them all living together. Can I squeeze two more in there?