I'd like to add that my horses live on pasture year round with free choice grass/alfalfa hay and a high protien grain twice a day.
Scotch, my larger horse who is more dominant, likes to hog the newly insulated lean-to my dad and I built recently. Because of this, I am concerned about his winter coat growth--he doesn't have one. We have had a couple of nights in a row below freezing and he still sports his summer coat. Before this winter, the lean-to wasn't insulated, and Scotch always grew a winter coat. I live in Minnesota, so he's going to need his hair to grow in.
Since Patches (my other horse) is chased outside by Scotch, he has grown into a fluffy little horse. I can feel the base of his ears and in his arm pits or anywhere else and he is quite warm. Other years both of the horses have grown in their winter coats at the same rate.
I've been told that Scotch probably could use a blanket; however, I've never purchased one and I'm at a bit of a loss! Would I need a mid-weight and a heavy-weight? Scotch isn't very active, so could I get by with just a heavy-weight if I watched him? Here are a few blankets that I was looking at. Any suggestions or comments will be greatly appreciated!
http://www.horse.com/Horse-Blankets-Sheets/Blankets/Reinsman-Boss-Series-1200-Denier-Turnout-Blanket-BEA32.html (I especially like the 2 year warrenty on this one).