Well i defo have more then 3 but i am doing my best to make sure they have human interaction so they dont get to flighty. I cut a single wings feathers on my chickens an alreaady bad plans to do it with the quail. Brooder has rubber textured flooring an it gets cleaned out every couple of days for health reasons. They defo will have plenty of space. As for heating i rather be on the cautious side and install a heat element in their house part as it does get very cold here in my neck of the UK. But thank you for your advice