BALLS!

You need to have a canine character jump on it now and then bounce off something, like the border of the animation, head first. As someone who used to own a dog, nothing will stop them in their pursuit of a ball, even a wall.

It looks like you got the effect that you were looking for. :)

i think on the roll you should keep it rolling, except slowing it down as it goes, instead of an ubrubt stop. but so far it's awesome ^^

You need to add another ball.
Then have them touching.
Then that'd be gay.

Seriously, looks good so far.

It doesn't follow a very good arc on the first bounce. It doesn't slow down very much near the top of the arc, and its path actually tilts UP at the apex...so it looks a little like it's accelerating into the air after the first bounce.

Also, going into the first bounce, it's coming in at a really shallow angle, I'm not sure it would bounce that high from that kinda' impact...

You also have it slowing-out of the first impact and slowing-in to the second hit - that should be the fastest point of the bounce, not the slowest. The slowest should be the apex of the arc. It's backwards.