Firstly it cant be boredom, he has lots of toys (rubber buckets, old rugs, the hose etc) that he's always playing with, paddocked during the day with a preg mare, has 24/7 access to a hay roll.... But the idjit is digging holes, deep holes! Break ya leg in type of holes! So far i've found 3 in the big paddock, 1 in the sand yard & just caught him digging a hole he started digging at 1yr ago! Not eating the dirt or anything (get's good vit/min supplement, is on both chaffs, Studmaster & Copra), just trying to get to china maybe? (gawd, take away Chinese! ) Why do horses do it?????