Grrrr!
In fairness something like this might be needed in a certain set of circumstances but my first thought is that maybe a Pyr isn't the dog for you.
To top that off, this poor Pyr looks miserable
http://dog-muzzles-store.co.nz/images/Great-Pyrenees-muzzle-dog-muzzle-wire-basket-muzzleB.jpg
