That's a very cool pattern! Got to love the cobs. As they're pretty much running the UK these days, we've been overrun with them as well, though at a bit higher of a price. It baffles me that you can get them at three years old (unbroke) for like 500 pounds. Crazy!
That said, I've had the pleasure to photograph a horse at an event with a mutation that the breeding stallion gives to each and every one of his foals. Really quirky.
The horse you think is the oldest, is almost always the one that is still three years old in his mind.