A sheep herding dog is still running circles around his favorite animals despite losing a leg this summer.

The border collie named Boss went missing in July while out working, rounding up sheep, and despite an extensive search-even using a drone-the pooch was nowhere to be seen.

Shepherdess Anna MacKinnon was sick with worry until eight days later when her father spotted Boss limping over a hill on their farm outside Perth, in Scotland.

"My dad was like, 'oh my goodness, that's Boss'," Anna told SWNS news. "I couldn't believe it-I was shaking."

The four-year-old dog had nerve damage to his front left leg, and after six weeks of vet consultations and waiting to see if it would improve, Anna made the difficult decision to allow vets to amputate.

"It just seemed so drastic, but we knew it was the only thing that was going to be the best for him," said the 25 year old.

She feared Boss would have to retire as a working sheepdog-but just three weeks after the dog's stitches were removed at the end of September, Boss was out chasing sheep again.

"He was keen to get out-and was back out chasing sheep!"

Despite missing a limb, the collie is just as speedy and efficient at rounding up the sheep as he was before the mysterious accident.

"After the anesthetic wore off he just went back to how he was before," she said. "He was really, really excited to get back out there.

Ever since he was an eight-week-old pup, his only desire has been to chase sheep and run around after them.

"He's a once in a lifetime dog and he's done everything I've ever asked of him," said Anna, who works on her father's farm.

"I'm so happy and proud to see him bounce back doing what he loves, but also it's hard to watch him be vulnerable.

"Going forward I have to just see how things go in his recovery, as much as I'd love to see him back working fully, I'd never risk his safety."

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