We have noticed that our cat's Tail has a kink at the lower end of (at the base) of his tail. We don't know how he got it, and he still waves it a bit, but he is not as expressive as he used to be. We can tell it is tender because he gets uncomfortable when you touch it and sometimes meows from the pain. We don't know what to do, as we have been told by our neighbours that cats tails can heal. Any advice.