Good morning, our temperatures have dropped quite a bit this last week, from 70s at night to 50-55 for the next few forecasted weeks. Highs around 70 each day. I know they don't need it now but at what point should I start winterizing their coop/yard. I have 6 (1 roo and 5 hens that are 7 months old), then have a second coop in the works for 3 silkies arriving in November. Just curious on the temperatures to start adding heat. Thanks