More height = more air volume for better air quality inside the coop, and taller walls make it easier to add ventilation above the roost where you need it most.The converted dog house is 1.045m tall so house does this play in the calculations as i only did the floor space?
3 is the recommended minimum, in part because this way if something happens to 1 bird, the survivors still have each other.I was told one chicken is lonely and two always fight for leader status and that 3 was the golden number... is this true?
Bigger openings are better since it's hard to add enough small openings to provide the needed amount of ventilation, but you need to take into consideration things like prevailing wind direction when placing vents. Vents will also need to be protected from the weather while being kept open 24/7, so that's where things like top hinged vent covers, louvered covers, baffles, etc. can help.So in terms of the ventilation do need to cut a huge hole in the top of the house or just more breathing holes?