You need to have the Pet Pal talent in order to get this quest. Roy's camp is a little north from the Goblin Village Waypoint Portal. After you talk to Roy and find out that the animals are going to be sacrificed, have a character with Pet Pal talk to Doreen the cow. Tell her that they are going to be killed and she will ask you to save them. Talk to Roy again and you can either buy the animals or win a game of RPS to free them. If the quest is not resolved right away Roy and the animals will disappear after a short while. After talking to people in Sacred Stone it is revealed the animals were sacrificed and the quest ends without reward.