It’s not unusual to slap a muzzle on a dog if it’s being aggressive or not keen on being given an injection, but a muzzle is not part of your average cat’s wardrobe. Yet there they are online, by the dozen, in a wide range of styles and colours.
Cats are independent creatures. Although many enjoy being petted, any more handling than that and they’re likely to get their claws out, as anyone who has ever tried to take a cat to the vet will know. Cats react badly to visiting the vet and often need to be restrained when they are examined or treated. Clearly, there needs to be a way to prevent injury to the cat and the people involved and in these situations. A muzzle may be just the thing.
But not all muzzles are created equal. The one below is not one of the better ones. The idea that a cat that cannot see is a less stressed cat is unlikely to be true. It may mean that it will struggle less before or during the procedure, but that may be because a terrified cat will often freeze.
It is clear from the body position of the cat in the photograph that it is not relaxed and is feeling very anxious. It is likely that it will be even more frightened the next time it has treatment.