Candy is one of the horses who starred in the film and there is no doubt that she doesn't have the most straightforward feet. She was a rehab who arrived here in 2012 and had been given a fairly dire prognosis from her vet.
Her feet were symmetrical on day one but she was landing badly and was quite unsound.
By the time she left she was developing less symmetrical feet but was standing and moving much better, although its her owner's hard work over the last year which has turned her into the rock-crunching pony who features in the footage.
The reasons for her asymmetry and the logic behind leaving her "flare" alone all become clear when you see the footage of Candy in slow motion which was taken last month.
Looking at her conformation in motion its obvious that her "flared" medial hoof wall is in fact necessary for her soundness.
Candy is a 20 year old horse and you can't reasonably expect to change her wonky knees but by letting her hooves compensate she can still land comfortably, heel first, and load her limbs as evenly as possible.