The Ulster Farmers’ Union says it is "disappointed" that two more farmers have been left to deal with the aftermath of dog attacks on livestock.
The union said the attacks come as Northern Ireland awaits "much-needed" livestock worrying legislation.
Seven sheep were attacked in the Carrickfergus, County Antrim area on 8th November 2018.
The dogs hounded the sheep through the night before brutally attacking them.
Ulster Farmers’ Union (UFU) deputy president, Victor Chestnutt said it is a "growing problem and something needs to be done."
“Dog owners must take responsibility for their pets. It is not acceptable for dogs to be allowed to roam the countryside freely," he said.
“When dogs get together in a pack they can be ruthless when it comes to innocent, defenceless animals like sheep.”
Mr Chestnutt added: “There is a consensus amongst dog owners that their pet dog would not engage in such attacks, however, I would urge dog owners to remember that the desire to hunt and chase is part of any dog’s natural instinct.”
With reports of livestock worrying in Northern Ireland at an all-time high, the UFU deputy president says it is a "major concern" for farmers.
“No farmer should have to go through this. It is not just the financial implications of a dog attack but also the emotional toll," he said.
"It is a harrowing sight to see ewes and lambs that have been seriously injured or killed by dogs. Dog owners need to step up but we also need tougher legislation brought forward.”
Farmers have been urged to report attacks to the PSNI and their local dog warden for investigation.
Despite a record number of reported incidences, the union says it suspects livestock worrying to be under-reported.
