“But when my daughter sent me some pictures, I just burst into tears - I couldn't believe it - writes getwestlondon.
“When I arrived, the pony was lying down and I thought she was going to go, I thought she was a goner, she was shaking all over."
“I would love to see the people responsible for this caught,” she added. “It's horrible and disgusting what they have done, it's absolutely sickening.”
According to the owners, this is not the first time the stables, based off Shavel Lane, has been targeted by vandals.
Previously, thieves have reportedly cut up and stole fly masks, rugs and head collars from the stables.