Tried this for the first time. I was expecting it to string replace all the names in the new file, but it seems that's not currently a feature unless something broke for me.

Is is something you'd consider?

1. generact BigDogs
2. Set new name SmallDogs
3. generact auto replaces all versions of BigDog with SmallDog (so bigDog->smallDog, big_dog->small_dog, etc)