Police Scotland said 12 lambs were killed in the attack at Holmhead Farm, Bucksburn, on the outskirts of Aberdeen, on April 14 and 15.
Two lambs were killed and several others were injured in an earlier incident at the farm.
Police Scotland said a man aged 21 had been charged.
A police spokesman urged dog owners to keep their pets under control around livestock.
Farmers Guardian has been working with partners the British Veterinary Association, National Sheep Association and with sponsorship from The Original Muck Boot Company, to raise awareness of livestock worrying and to ultimately drive down the number of attacks.
FG has also been working with police to educate officers about the seriousness of the crime and its impact on farmers and the countryside.
Eric Danforth who farms in Barnsley, South Yorkshire, said he was concerned farmers were not reporting dog attacks to police and as a result, the statistics were being skewed.
Investigations by FG have revealed there were more than 3,000 dog attacks on livestock in the last three years.
Mr Danforth said: "The figures are bad enough as they are but I fear they may actually be fiction. The true figure must be a lot worse.
"I know a farmer in Sheffield who gets an attack nearly every week and he never reports it."
Mr Danforth said call waiting times to 101 and a lack of action by police after crimes had been reported was putting farmers off.
"My advice would be to report each incident and make sure you push for a crime number," added Mr Danforth.
"If you don’t get a crime number the incident isn’t logged on the system."