How do you put your horse to sleep on how?

Click the sleep button under the night tab on the left hand side of your horse's page, about half way down.
go onto the horses page and then go down to sleep it will have ageing points and sleep click on sleep and choose to put your horse in the meadow or box WARNING-your horse must be at least 6 months old or in a centre-WARNING

be careful! a horse or pony on howrse MUST have at the LEAST, 60% energy or the health will go down and your horse will die.