I understand that horses need their REM sleep which occurs when lying down. I have owned my OTTB for 19 years, ye is now 24 and I have never seen him lying down. He is out 24/7 for 6 to 7 months of the year and in at night during winter. He will roll outside in the field and does not have any difficulty getting up but he does not stay down. Have never seen him lie or roll in his stall and have never seen a speck of bedding on him which indicates to me that he doesn’t lie down.
Other than the occasional stall walking he has not shown any sign of stress. Stall walking would occur sometimes in the summer when I brought them in because of the bugs or occasionally during the night. Ulcers were ruled out and I often wondered if stall walking was caused due to change in weather.
Is there any information available that a horse can go through life without lying down?