Belinda Horne said she had a mob of sheep grazing on the west bank of the Silver Stream, between Riccarton and Gladfield Rds last week.
On one of her daily checks on the sheep, she found one of her ewes had major injuries, including its intestines hanging out.
"She had been badly savaged on both sides — you could also see a wee bit of her lungs on one side. It was just awful.
"She was still alive and we had to put her down. She was in a really bad condition. She’d been suffering for a while."
She said she had called dog control but they could not help because the dog was long gone.
She believed the owner must have been able to get to their dog mid-attack because it was the only sheep that was attacked.
"If the dog was roaming, it would have attacked more sheep. They get into a killing frenzy.
"The person must have been there and managed to get the dog or dogs off when they got there and taken them away, and left the poor sheep suffering.
"That’s just not on."
It was not the first time her stock had been attacked by dogs.
About two years ago, nine of her sheep were killed by two pig dogs in the same area.
"It’s all so preventable."
Farmers were legally entitled to protect their stock, and if a dog was seen worrying their sheep again, chances were high it would be shot, she said.
"People run their dogs up and down the other side of the bank, and that’s OK as long as they’re under control.
"But if they’re not under control, they should be on a lead."
