You shouldn’t hiss at your cat because they might perceive your hissing as a threat. Since cats use hissing as a defensive mechanism to express any discomfort, to avoid confrontation, you should also avoid it.
To have a better understanding as to why hissing at your cat is a bad idea, we need to understand why cats hiss in the first place.
Hissing doesn’t express aggression or hatred. On the contrary, when cats feel threatened or afraid, they will hiss; it is not something they can control.
Cats can hiss at other cats or people, and when being on the receiving end of a hiss, this sudden sound can be startling and your cat will quickly associate it with a possible attack.
Don’t hiss back, and don’t use water bottles or loud noises because this might only make your kitty even more afraid, and they might run away, or even choose to attack.