This isn't so much of scripting, but changing the patches, which is a pain. It isn't possible to 'shrink' any of the models in game, so new ones would have to be added. (The shrunk pets are actually different models).
To do this, a new animation for walk, run, war mode, standing still, and in all 8 possible directions would have to be added to the current patches, then everyone would have to download them all again. This requires a ton of art work and time to fix the patches once the art was finished.
If someone knows of another shard that has this already done, the work can be 'borrowed' much easier, but it would still require some patch work and everyone to re-download the SH patches.
To do this, a new animation for walk, run, war mode, standing still, and in all 8 possible directions would have to be added to the current patches, then everyone would have to download them all again. This requires a ton of art work and time to fix the patches once the art was finished.
If someone knows of another shard that has this already done, the work can be 'borrowed' much easier, but it would still require some patch work and everyone to re-download the SH patches.