The Kitty's Tail

I was sitting in the rocking chair, and suddenly both cats raced to the front of the living room - one jumped on top of a chair, and this one up on to the radiator cover.  I couldn't imagine what they saw.  I went to the front door, and saw the reason - a squirrel was walking around in the rain gutter.  Man, how did these guys even HEAR that squirrel?  Anyhow, I noticed the curl in this kitty's tail, and was fascinated that she kept it this way for quite a while.  I just love the design that the curl makes!