That weird little bunny-hop pose is the default value for bones in Unity when there’s nothing animating them. Your animation only seems to be affecting the tail wagging.
If done properly on the right layer, it’s fine. If you’re seeing this in-game after uploading though, you probably have it on the wrong animation layer.
More about animator layers here:
You’ll probably want that in the FX layer (possibly Additive - but rarely used really).
Also the proxy_ animations are not actual animations - they’re just the first frame of an animation that gets overridden by the VRC Default animation by the same name. (So if you have proxy_run added, that gets replaced by VRC’s default run animation).