Horse with broken dock or tail?

Answer 1

Horses/Ponies can't really "break" their dock, their tail can be ripped, and uneven if it was caught on a fence, so it is then usually cut clean again, and a horse who has been a racer in the past may have been "docked" which then means it's tail cannot grow back to the lenght it was, meaning it is also more proned to flies in summer and needs more care taken of it then horses with long tails.