We had a litter of pigs that had really swollen lymph nodes. There was one that was worse than the others. Could not even lay down to nurse or be held with his oxygen being cut off. He had PRRS. I had only 3 survive from that litter and he was one of them. Lucky for you your pig is older than what mine were. I had 2 litters with it. 28 babies and I lost 23 of them. 1 of them was never sick a day in her life.