CORRYONG farmer Russell Murdoch is at his wits' end over wild dogs.

Relentless attacks on his livestock, worry over losses and the inability of authorities to control the dogs have pushed him to make a stand.

After dogs killed nine lambs in one night, he dumped them on the doorstep of the NSW National Parks and Wildlife office in Khancoban last week.

"The problem is getting worse and worse," Mr Murdoch said. "We are near a national park and I have no doubt they are coming out of there.

"Parks staff can't control them ... and we have no hope of getting on top of the problem."

Mr Murdoch and his wife, Katrina, have lost cows, sheep and goats. They are considering selling and farming elsewhere.

NSW Parks regional manager southern ranges Dave Darlington said he understood why the Murdochs were upset, but stock losses due to wild dog attacks were now "significantly less" than they were a decade ago.