The stable groom soon enough had the new stallion pony in a box stall. A pale of water and a feedbox full of grain and hay the pony began his mindless duty of eating.
Unknown time elapsed until Erin bucked his head up and became alert. Looking about he noted his whereabouts and standing one hoof inside the food box lifted himself.
A good vantage point he sighted a friendly mare who was even now willing with tail held high. The stable groom was busy with one of the shire workhorses and this made Erin think. Nimble lips and human mind made the latch easy to lift.
A stall door slid back on it's rollers with easy. As the massive wood and iron bar door flew back Erin took pride in the beastly strength of his neck and shoulders. A prance about and he was muzzel to cunt with a mare in heat. The size of this mare was taller than the ponies he'd the evening before had so enjoyed.
A bound and he stood about right with the sopping cunt. Erection came with haste as Erin plunged deep and closed his eyes with absolute delight. Humping brought forth a quick flow of semen and in just a minute he stepped off of her.
Shaking his great head Erin wondered why he hadn't stayed aboard longer. The mare seemed quite satisfied by his actions and went about eating from her feed box.
The stable groom was not too keen on this happening as he came back on the run. A clip of a rein and Erin was pulled to a pasture gate and shoved into the half snow covered field.
Now the daytime Northwestern winds chilled his hairy body. A tingle of cold air touched the now open and puckered pony asshole. The tail covered his butt and with an extra sterness he tightened it down to protect it from the cold.
As time wore on the cars with people arrived for the big costume party. Erin watched as some friends came he whinnied aloud but few gave a casual look to the pony in a pasture.