Adding insult to injury, the vandals had also left a pile of rubbish including paper cups, napkins and disposable cutlery.
"I was upset and disappointed,'' Skye said. "I wanted to help pay for feed and saddles and stuff.''
Mother Chantelle Stevenson said Skye could understand that people might take poo without paying for it because they needed it for their garden to grow food for their family.
She also knew there was a chance someone might steal the money because it was next to a busy highway.
"What she couldn't understand was, why would anyone smash up her stand? She couldn't get her head around it."
The family was flooded with messages of support after Stevenson put up a post on Facebook about the incident. One regular customer even vowed to pay $50 for the next bag of pony poo.
"When she read the Facebook feedback she realised a lot of people really are nice," she said.
Skye's previous business venture was picking and selling oranges, which earned her enough money – $780 – to buy her first pony, Gabby.
She had helped break Gabby in but had since outgrown her and bought Delilah.
Skye plans to rebuild the stand and get back into the pony poo business this week.