In California , where land is very costly, and you get a 12 x 30 pen, it is up to you to take the horse out, round pen it, exercise it, etc. I would not pasture board anyones horse due to the liability issues. TO many people in CA sue over the slightest thing, and Insurance is very costly. I would Never turn any ones horses out. There is no Equine Liabilty law that covers property owners as in other states.