My suggestions for blanketing come from 2 things she said in her original post. #1/ He's thin
#2/ He doesn't have free choice hay, he gets 5-6 flakes per day
#3/ Oklahoma has been on the yoyo for temps this year too, so my horses aren't all haired up like they would be if it got cold and stayed that way.
I have mares who think it's spring and are teasing. They should be 'closed for business' by now.
So because of crazy weather, his thinness and no free choice hay, I suggested she blanket him to help him hold his warmth. 1/2 of my horses are blanketed (show horses that were clipped for Nationals at the end of Oct, those who've never been out of CA or AZ and one who's thin and just got her), the other 1/2 (pure pasture, up to good weight, plenty of shelter, free choice access to hay) are not. It's an individual thing and I go by how each horse seems to be holding up. If anyone starts losing weight, even the pasture ponies have blankets, I'm just not using them yet.