Nervous first-timer here, so I might be overthinking. We put our 8-week-old chicks out for their first night in the coop yesterday and they did just fine. They've been in their enclosed run during the day for the past week or so (temps ranging from 40-55F) and last night it dropped down to 27F here in Iowa. But tonight it's supposed to be 15F (9F with the wind). Their coop is insulated, well-ventilated, and draft-free, but I'm still a little nervous since it's a big drop from what they've been used to. Is there anything else I can do to make sure they're okay in the coop tonight?