If they are baying a cat they are ready to see a pig. I would let them bay together and would bring a pig to them in surroundings they are more comfortable with. Would tie it and tease em until they get fired up and then pull it away and leave em wanting more. When they are that young be careful not to let em get banged up until you get the fire built inside em. If they don't have interest give em a few months due to different lines starting later. Good luck
Right on the head.