I clip my horse because in winter he sweats quite a bit, so it is easier to cool him down, and there's no long winter hair to get all sweaty and have to dry out. I have shown western pleasure before and since body clipping is frowned upon in that world we would keep our horses blanketed with slinkies and the whole nine yards to try and keep their winter coat to a minimum. We would also leave lights on for longer in the barn, since light schedules affect coat growth also.
Sully ~Sullivan's Fly Supply~ [17.1 TB] RIP 2/24/14
Rio ~Camperio~ [18.0 Oldenburg]