I don’t I just put em back in. The pecking order begins again. Now honestly you need to remove some roosters for 18 hens 2 is more than enough. But I personally would only have 1 if they don’t free range. I have 45 chickens and 3 roosters right now but we allow our chickens to free range for a few hours each evening.Thank you. I will separate him. When I return him to the flock, I should do it at night, correct?