Pinioning! Thank you, that was the word I was looking for.
There are more ways. I know that they burn the end of one wing on young chickens to prevent them growing feathers due o scarring. But that is just as horibble.
But yes, you need to damage or remove the feather follicles to prevent them growing again. But his previous owner knew next to nothing about birds. So luckily that didnt quite work out.







