Is the litter box kept clean? How often do you clean it and change the litter? Also, do you have any other cats that use the box?

Not much you can do if he's not willing to eat. Make sure kitty has plenty of water at least and is kept warm and inside and keep offering food, but get him to the vet ASAP. In the meantime watch for any other problems and keep a good eye on him.

My cat started peeing around the house suddenly after using the litter box for years. Turned out she had a urinary tract infection that was causing the behaviour, because it caused the litter box to smell unpleasant to her after she went, so she woul...

Black cats are adorable. I like Taz, or Awol for names because they're simple yet uncommon, but go with whatever you think suits his personality :D