Does anyone there know any tricks of the trade for encouraging winter hair growth? I've never seen a horse this slow to grow his winter coat...he came from Ontario but I don't think he's been on full time turnout since he was a yearling. He's on wheat germ oil and flax already...and while it is above freezing, he's been out 24/7 with a run-in...but if it gets much colder here, he's gonna be one sad boy and I hate to blanket and stall him (very active boy) if it can be gotten around!
HELP!