My 2 freshener has developed a lump in her udder (right @ the back of the udder, just to the right of the medial) It is about the size of a ping pong ball. Smooth & round, and does not move under the skin, but is attached to the tissue. What is it? I have read about blowouts, but I haven't heard of them being on the back of the udder, always near the teat. Is this a blowout??