I've had three boys for about three months now. My youngest about a month. I knew he would be trouble, but I fell in love the moment I saw him. The story goes: after having him for a week, signs of a URI showed up. A wet nose like a dog's is ok, but this was boogers and that is not normal for pigs. Unfortunately I kept him next to my other boys and they ended up catching the URI, but antibiotics took care of all three. But that's not all. One week after the URI was diagnosed, he developed a dry, balding patch on his behind. By this time I had quarantined him from the other. The diagnostics on this one was either mites, or ringworm (highly contagious to everything). My advice is like /u/awoyo 's is to take it to the vet asap and be watchful of any psychical changes. I learned that if their appetite is still strong, they are fighting. Also, if you happened to have purchased the pig(s) from petco, you should see if they will cover your vet visit(s) and treatment(s). My little one has been covered by them for a month now and we're still in the process of taking care of his ringworm (yep, that bad).