Possible to change size of animals?

Is there any possible way through a mod to either increase or decrease the scale of an animal model? I experimented a bit with this and couldn't find a way. We have access to the skeleton which gives all bones and each bone has a transform attached to it, but I could not find any way to affect the model from there. It seems any value I change in there has no effect.

Any ideas? Am I trying the impossible?