To achieve REM sleep horses need to lie flat out on their side with their legs outstretched. Horse owners often have a momentary panic when seeing their horse in this state when they haven't responded to their call.
Read MoreEver wondered what your horse gets up to in his stable? This fascinating film shows 8hrs in the life of a stabled horse via time lapse camera, condensed into 8 minutes.
Read MoreNational Hunt racehorse Kauto Star was euthanised last week after being injured, presumed to be from a fall. He was put in cross-ties as it was presumed his pelvis was fractured.
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