OK, I know what you are thinking. He is over a year old - should he know it is there by now? After watching him last night, I would have to say the answer is NO!
I see him running around and stop to watch. Yep - around and around in circles chasing the big fuzzy tail. He finally caught it at one point and pinned it down with one paw while he saw down to breathe. It was VERY cute.
I have seen my fosters do this before. And Bugs from the last group was fascinated with tails - probably cause his was so short he couldn't find it. But he has a lot of fun chasing everyone ELSE'S tails. :)