I don't understand the definition of 'feathering' you're using. I read the site you linked on the first page (gorgeous pictures!), but still don't get what the difference between 'real' feathers like gypsies and supposedly not 'real' feathers like Freisians, Halfies, etc. When I say it, I mean any horse with lots of long fluffy long hair around their fetlocks, sometimes so much that it's growing and covering everything from the knees and hocks down. When I do a search for feathered breeds of horses, I get Freisians, Shires, Gypsies, Clydes, Halfies and more.