so for a birthday present my boyfriend is building me a second coop. it's going to be 3'x4' with an attached run. it's going to mainly be for young birds. he's putting in 2 Windows that can be closed. he is saying that he will leave the soffits open for ventilation. will that be enough ventilation? in the summer I'll leave the Windows open for a breeze. any input is greatly appreciated! Thanks!