Here's my constructive criticism: The way the mane and body bounces up and down is very well done. The shading is also nicely done as well, and consistent except for her jaw shadow, which recedes as she bounces upwards. The only problem I have with this animation is the tail. As she bounces upwards it looks like the tail is extending and growing outwards, instead of bending upwards. Instead of having the whole back end of her tail flip up when she bounces, perhaps you could just have the tail bounce up and straiten a bit. Besides that little issue, this animation is adorable. You should keep on animating!