You can't mix both chickens and quail. Chickens can carry Coryza, (a bacteria that they are not effected by) that kill quail. Quail require a 28% protein diet, quail can be killed by chickens and have different nesting and roosting requirements. So they need to be kept in their own quarters unfortunately.Do quail mix well with chickens? I would love to put them all together but since quail are on the smaller end of things, would chickens bother them?