Last night I was petting Oliver and noticed a small lump on his back, under the skin - of course that completely freaked me out. It didn't feel hard, nor did it seem like it bothered Oliver when I touched it. What's weird is that we gave him a bath 2 days ago and did not notice it at all. I looked online for what it might be and a lot of the sites say that its probably a lump of fat or something like that. DH is taking Oliver to the vet today, but I was wondering if anyone else has had an experience with this. Is it weird that it just showed up all of a sudden? Does this stuff go away on its own?