Have Cat Questions? Ask a Cat Vet Online.
A few of the more common causes of drooling (fluid from mouth) are having tastes something distasteful (toads, some chemicals, medications), a foreign object such as a stick or bone caught between either the upper or lower teeth, a lesion in the mouth (abscessed or infected teeth.gums, tumors), systemic infections (feline herpes) and kideny disease.
An examination and possibly some diagnostic testing by a veterinarian is required to get the diagnosis and determine treatment.
Has your kitten been vaccinated for FVRCP, feline leukemia and rabies?
Let me know if you have follow up questions.