I had hoped having the horses in overnight might warm up the barn, but it's at -5C at the east end of the barn where the horses stalls are, their water buckets again had ice forming.
I think I am going to treat the whole barn as an 'outside' area (like a run), and the Hen Houses as the 'inside' area. I think if I put up some of those plastic curtains they use in grocery stores, and cold storage plants, etc - like this:
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Or maybe one of those magnetic door curtains like this:
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Rather pricey for both these - bet I can make something from heavy poly... If I can get something like that put up and put one of those oil filled radian heaters in the Hen House, it will be a warming location for the chooks (help keeps eggs from freezing also!).
This needs sleeping on, I still have poor Mr P's harem in the Summer house but I guess I can remove the IR panels in the Hen House and put in with his harem. It's just annoying that those bratty hens keep picking at him, I could just let them all run together if it wasn't for him being picked at. Brats all of them I tell you, brats!