Our fancy horses (personal riders) would get pretty dirty during times of the winter, waiting for decent weather to clean them up. The working horses were in a pasture, they were on their own until spring.
I'm going to guess that any horse (or pony) that has hooves in that good of shape is not neglected. They look sorta fat and sassy, too.
I've been bitten, kicked and stomped by ponies. Delightful childhood memories, good for another time.
Thanks for another wonderful part of the journey.