Check to see what it wants. If the cat has food, clean water, a clean litterbox, and you've paid attention to it in a reasonable amount of time today, then maybe you should take it to the doctor.
However, I can't shut my cat up when it wants to go outside unless I don't care how much he begs until he gets tired an let it go.
it's out of food ,water ,it's litter box is dirty or it's bored is probably why it's meowing in the first place if so then ten to these needs and he will be happy.
still meowing? then pet him and he will probably stop hope this helps
Get down on its level. Give it time to move before you walk by. Offer your fingers, palm up, for it to smell, rather than just reaching your hand toward the cat. Just think about how HUGE a person looks to a cat. it's scary to some cats.
Get them spayed or neutered. Neutered cats turn into marshmallows and become quite 'innocent' after that.
make it trust you or lie you
If your cat is hissing at strangers you can't stop your cat from hissing at them. The only thing I can think of that would stop a cat from hissing at someone is letting a cat get to know a person long enough that the cat isn't afraid of the person, and will therefore get along with him/her.
when your cat hiss does it hurt them
When I got my cat a few months ago my dog hated him, and my cat hissed a lot. Your cat might be territorial, or just isn't used to your new cat.
Hissing means that the cat is scared and it is trying to defend its self so stay away if a cat starts to hiss and arch his/her back.
Some people think that spraying cats with water is good discipline but it doesn't honestly help. A hiss is a hiss as long as the cat is not attacking and/or being aggressive towards another cat. A hiss is normal and it is basically a warning towards the other cat. So to sum this all up, you don't really control a cat hissing, its natural.
Obviously, it didn't agree with your cat!
very carefully
theirs no way for any one to stop a kitten from hiss... or an older cat.
See if the cat has ear mites.
Normally you would hear a hissing sound accompanied by your cat being angry
maybe your friend smells
scraching,hissing,meows,purrs,and biting