I tried resizing my walking cat GIF/avatar* (via Photoshop) and all that did was create a single static image. I clearly have little idea what I'm doing — 99% of what Photoshop is about is opaque to me in any case. Any hints for the hopelessly handicapped would be gratefully received.
(* 51 pixels wide x 116 pixels high)

Am I in danger of having my semi-squashed pussycat 'erased'?

That must be wonderful; I have no idea what it means.
— Molière