My cat's ear was a little swollen and puffy last week. I noticed it felt like there was fluid in it. I'm guessing he must have injured it while playing with one of my other cats. It didn't seem to bother him so I have just been monitoring it. This week most of the fluid and puffiness has gone away, but now I notice that his ear looks kinked. It doesn't stand up straight. Should I be worried? Has this happened to anyone's cat? If so, can I expect that his ear with return to normal?