Investigations are ongoing after separate incidents of sheep mauling and worrying in Colne.
Police have reassured residents that they are working with other agencies, including the RSPCA, to clamp down on the issue in the town.
They have reminded dog walkers to always keep their dogs on leads around livestock, and have urged residents with any information on offenders to step forward.
PC Nigel Keates said: “Investigations are ongoing. What we would ask is for members of the public with information to come forward and speak to the police. If they are not happy with that they can speak to the RSPCA or Crimestoppers anonymously.
“If we have cold hard facts there is more we can do about it - information is key.
“It isn’t always young lads setting dogs on sheep - in one of the recent incidents the farmer had to seize a spaniel from one of his sheep.
“People think that because their dog is good around children and other animals in the house they don’t need a lead - but for them the sheep is just a kebab wrapped in wool.
“We are the eyes and the ears for the public and we are prepared to listen if they come forward.”
In one of the instances a prosecution is pending after a number of sheep were killed following attacks in the Hollin Hall area of Trawden.
In another instance, an investigation has been launched after sheep were found dead on land at Hubb House Farm, in Colne.
Derek Smith, Lancashire County Council trading standards principal officer for animal health, said: “We have received a number of animal health complaints relating to land in the Waterside area of Colne and are currently working with the Animal Health and Veterinary Laboratories Agency to investigate. We will consider appropriate action once this has been concluded.”
Call police on 101 with information. Alternatively contact Crimestoppers on 0800 555111.