I have a flock of 9 (8 hens and 1 roo) and would like to add up to another ten hens. Is there a better time to add chicks? Is it too late now that the weather is starting to get cold? Or is it better to get them now so they have feathers before it gets too cold? (I thought if I add them now they can grow while it is winter and be ready to lay when the weather gets warmer.) Is there a best time to add chicks?