It's gotten bigger over the last couple of days. We noticed it when we picked him up, but it was much smaller. If someone can't tell me exactly what it is, he's off to the vet.
It doesn't seem to bother him unless you touch it. He doesn't like it being touched. I don't know if it just annoys him or if it pains him. He doesn't yelp or anything, just kinda pushes you away.
