How can I morph two different clip in After Effects?

[Jevjev]

So, I have two hand-drawn silhouette animation with transparent background. I rendered them from Premiere Pro. One of them is a running cat  and the other one is a flying bird. I would like to make the cat to morph into the bird but it's important that both of them are moving so I'm not sure if mask works here. How can I make it? By the way both of the animations are .mov files but I can change it if it's necessary. Ugly deformations are OK, too, because they are silhouettes so It's not important to follow shapes and linearts.

[Mylenium · Accepted solution]

Unless you plan on spending money on third-party morphing plug-ins, your best bet would be to re-trace the animation as masks/ shape layer paths and "morph" by animating the shapes.

Mylenium

[Joolsd]

Animated paths are the best way to morph shapes if you have time. But there is also 'reshape' which use the mask.  It works quite well on photos as well.