Can a puppet cat's mouth be wide open?

It is still possible to get out of the embarrassing period.

Tone is a natural genetic factor. During the embarrassing period, the whole head contour of most puppet cats has not been opened yet, because the body should give priority to growth.

If your cat has come out of the embarrassing period and is shaped, it will basically not change. Muppets don't have gills, so the width of their mouths and noses is still linked to their pedigree genes.