I'm ordering blankets for the minis so while I'm ordering I thought I should get a hood for my Mare now if I was going to at all.
My horse is stalled in a heated barn at night (heavy blankets come off) and out in turnout during the day. If it's really, really cold out the BO will keep them in. I have a midweight blanket and a liner for some flexibility.
Last winter it took me over an hour to cool her off after a lesson but she wasn't blanketed at all then.