Pain can cause a cat to act like this as well. -- to have reactions to vaccinations. Now get up and serve your master hooman.
Up to 20 cash back my cat is not eating is hiding in dark places like under the bed which he never does unless ill. Its unfortunate that this has happened on the weekend. This is more likely if he has ingested something unusual such as certain houseplants. If your cat isnt eating as much as he used to there also could be issues going on in other parts of your cats body.