don't know if this is the right place to post this, but i just noticed yesterday that my cat has weird bump on his tail. it's maybe a half and inch big, and he won't hold still long enough for us to look at it. he doesn't flinch or anything if we touch it, so it doesn't seem as if it hurts. do any of you have a clue as to what this might be? if it's still there in a couple days, we will probably take him to a vet, though we really can't afford it. i just odn't know if he got it stuck somewhere, or this could be something serious