I'd love to stay on topic but MegaFun just poked me so forgive me.
I know Horned Tail. It has three heads. That makes it immediate fail. It's also not that big. Besides, Yiazmat lays down the law. He has millions of people out to punish Horned Tail for stealing a dragon egg. >_>
And yes, animated avatars are allowed here. Problem is, if your internet connection sucks, it could lag you here until it fully loads.
That and the size of the .gif file for this particular 15 second animation is HUGE.
It's on a site but I can't link it cause it has some badness on it. But a lot of them were cool
I'll try to post some individually if I can.
If that's the case, then save the image onto the computer and load it as your own.
However, if the avy itself is naughty then don't bother. :O