I have 20 Australorps... during the latest cold snap here in Florida (27 to 32 degrees for about a week; o.k., not much winter, I get it!), my hens went from about 15 +/- eggs per day, to 8 per day two weeks ago, to only two eggs over the last 4 days... what's up with this? Their coop is enclosed, and they're very happy hens, well cared for, with plenty of daytime room to roam. They're less than one year old, have been great layers, then this... any help out there? Any way to boost them back?