Rabies is very uncommon in domesticated animals and unlikely to be the problem here. It is still a possibility since this cat has not been vaccinated. Drooling and lack of appetite signal nausea which can be related to many, many things. Have this cat examined by a veterinarian to rule out the common causes of nausea--like dietary indiscretion, diarrhea, intestinal parasites, pain (like from an abscess), foreign body obstruction, toxicity, kidney problems, or liver disease.
Has she been bitten by something? Does she go outside? Drooling and Salivating is a sign of Rabies. If she hasn't had her vaccination, I would get her to a Vet Immediately.
Mine too. They are two kittens and they died instantly