Police are hunting lamb killers after baby sheep were found dead in the same field on consecutive days.
One lamb was found dead in a field off Litchborough Road, Foxley, on April 11 and another was found in the same field the following day.
Tests have shown they were killed with sharp tools, rather than by other animals.
Officers investigating the deaths are appealing for any witnesses to come forward.
Call Northants Police on 101 with any information or alternatively, call Crimestoppers anonymously on 0800 555 111.