Since Feleuk can cause problems anywhere in the
body, the
symptoms would depend upon where the disease is located. For example in the gastroenteritis form, anywhere from the mouth to the anus can be effected. There could be mouth problems such as stomatitis, chronic periodontal disease, in addition to vomiting and diarrhea.
In the polyarthritis, immunosuppressive form, a cat could have lameness, joint swelling and pain.