Cold extremities in my cat?

Most likely he is sick. Could be something lodged in the stomach such as a furball or maybe he's severely constipated. That happened to my cat. A cat laxative helped her.

Get him to the vet ASAP. No food or water for more than 48 hours can prove fatal (especial water...dehydration)

Good luck.

Oh my God! I hope that your cat isn't suffering from what it sounds like to me. I don't want to panic you, but you need to know that arsenic poisoning causes those symptoms -- abdominal pain, lack of appetite and cold extremities. In case you don't believe that you have anything around your house that contains arsenic, you might want to rethink that. Heartworm medications contain small amounts of arsenic at sub-lethal ranges, but if an animal gets hold of the medication and gets an overdose, it can be lethal. Also, insectisides that people use in their homes to kill ants, roaches, etc. contain arsenic. There are also other things that people have around their houses that contain arsenic and are very dangerous to animals. So, if you haven't yet decided whether or not to take your cat to the vet, let me tell you -- NOW is the time! Hopefully, the problem isn't nearly as serious as what has come to my mind. Since I'm not a vet, I don't know EVERYTHING, and there are probably other things that can cause the symptoms that you mentioned. But just in case, and to be on the safe side, you need to get your kitty to the vet right away.

Yes that is very unusual, I think it is time to get that cat to the vet.

R P CAT