Does anyone have any suggestions on what type of ventilation we should use for our coop? The coop has one small vent in the front but thats it. We are hoping to install some sort of ventilation on the roof and possibly adding a vent or two in the back as well. Was wondering what type of roof vent would you recommend for the roof of our style coop. We have hot summers and very cold winters. Herve is a photo of the coop. Thanks for the suggestions.