I believe Oscar is healthy but just a little naughty. When we first got Nugget, at 2 months, she bit when we were walking with her and when I held her up to check her nails. I blew in her face once but that didn't seem to help. Putting her in with my other girls made it stop completely. They are now frineds, hardly any fights, maybe he's just nerveous around people. I would consider adopting his brother.
But maybe Nugget's just a wierdo.
He seems to be one of those tempormental pigs though.
P.S. He's becoming a full grown pig. Pigs are considered adult at around 9 months (after teen satge) He's not a teen anymore. Nugget is just becoming a teen, she's 4 months now.