A second NSW piggery has been inspected during ongoing investigations into animal cruelty.

Last week animal rights charity Animal Liberation leaked footage which it said showed buckets of dead piglets, a sledge hammer used to bludgeon pigs, and sows with open sores at a piggery at Murrumbateman.

Authorities subsequently investigated the piggery and issued the owner with an order to improve conditions.

Yesterday government animal welfare workers and representatives from the RSPCA and Livestock Health and Pest Authority said they had visited another piggery in Young, which they say is linked to the Murrumbateman business.

"RSPCA NSW is continuing to review video footage of the alleged mistreatment of pigs and investigations are ongoing," the Department of Primary Industries said in a statement.