So my Roo Roo has this nasty tumor. We noticed it a while back and now it's gotten bigger. We didn't do anything about it initially because it didn't and still doesn't seem to bother him at all. He's two years old now & his personality has stolen my heart. At first we thought we would let nature take it's course as long as it didn't bother him... But now I want to do something about it. I do want to take him to the vet soon, but I'm curious if anyone knows how serious this ugly thing could be? He's completely unaffected by it.