NSW Police said two lambs were allegedly mauled by dogs at a property on Coolagolite Rd, Coolagolite on July 14.

Police said the landholder found one lamb dead and the other badly injured as a result of the alleged attack, and the injured lamb had to be put down.

"He sighted two large dogs described as having long white hair on the property," police said.

If you have any information about this incident, or you believe you know who owns these dogs, call Cobargo Police Station on 6493 6444 or Crime Stoppers on 1800 333 000.