I'm raising pigs for the first time and things seem to be going well. However, I noticed that my girl seems to be in pain. She walks fine, eats, and is able to poop and pee easily. But when standing, she is hunched up and prefers to spend her day curled up. And when I felt her tummy it's super tight. A friend suggested it might be colic but he has never raised pigs before. Any suggestions would be greatly appreciated.