An animal leg found on a Bay of Plenty farm in a delivery of palm kernel feed from Asia was from a sheep.
That is the latest conclusion of the Ministry for Primary Industries after DNA testing.
MPI deputy director general Andrew Coleman said a range of factors also led the ministry to conclude that it was from a domestic sheep.
However, farmers in the Bay of Plenty say they will remain sceptical of the verdict.
Labour Party agriculture spokesperson Damien O'Connor said he finds it implausible that MPI took six weeks to identify a local sheep.