How do you complete objective 55 on howrse?

Answer One: Well all you have to do since you boarded it in an equestrian centre is to click on put to bed which is near the little message box where it tells you what's happening to your horse and choose where you want your horse to sleep. and then hey presto you did it!

Answer Two: The quest requires you to put your horse to bed, so you need to look down the left hand side of your horse's page to the night tab and click put to bed.