Kim, A/D is a wet food available at most vets offices. It's similar in consistancy to baby food, and slightly warmed up, most cats love it. Maybe get some syringes for dogs, and add a bit of water to A/D or even baby food, and force feed him to get something in him. Have you offered him stuff like boiled chicken, or meat baby food? If he's dehydrated he may feel less like eating as well. Sending prayers to you and Tucker that he'll perk up in a day or two.