holyjeebusbatman:

PLEASE, by the gods, don’t actually do this past childhood please. It can be potentially painful and can cause stress in your cat.

There are several sources regarding this

Scruffing a Cat — Why You Shouldn’t Do It and How to Restrain a Cat the Right Way | Catster

What Effect Does Grabbing a Cat by Its Scruff Have?

Even the aspca says not to do it

General Cat Care

So, please, from one cat owner to another. Please dont hurt your kitties by grabbing them by the scruff past childhood