we have 30 head of horses they are outside 24/7/365. I don't know if they like it or not non of them have ever said if they like it or not. Here in Montana we can get down into the -30's and lower in the winter. I feed hay all winter and they all do fine. It is something a horse has to be used to to take a stalled horses and throw them out all at once I feel is wrong it should be done slowly over time.
It would be nice to have a stall or two for when horses are sick or needing doctored.
The only time I feel sorry for my horses is when its cold and rainy as long as they are dry and have a belly full of hay they are fine. But man when its just above freezing and its raining that sucks.
This, unfortunately, is the weather condition of Western Washington through much of the winter; wet and cold, but not dry cold.
Still, as long as the wind is not blowing , they have really long coats, and if you've ever worn a wet wool sweater, you know that even wet, they are warm.
I have been at a "barn" where the horses are out 24/7 so long that I've forgotten what it's like to go get your horse out of a stall, strip a stall, feed in a stall. It seems quite odd to me.
I must say, there is not one horse in the herd of about 15 that has real behavior issues. They are all, "catch me and ride me" easy. That was not the case when I was at a big barn where the horses got at best 2 hours of turn out in a dry paddock, alone, a day. It was take me out, lunge me, now ride me.