How can I tell if my 6-week-old kitten has FIV or feline leukemia?
Keep in mind that many diseases have similar symptoms, so the only way to definitively know if a kitten has a specific disease is to be blood tested for it, and I do recommend having that done if you suspect your kitten may have one of these diseases.
Kittens born to mothers infected with feline leukemia can have it, and symptoms include anorexia, slow and progressive weight loss, poor coat condition, enlarged lymph nodes, fever, pale gums and other mucus membranes, persistent diarrhea, eye conditions, and infections of the skin amount many other symptoms.
Symptoms of FIV include fever, poor coat condition, anorexia, diarrhea, eye conditions, infections of the skin, bladder, and upper respiratory tract, weight loss, and various types of cancer and blood diseases which are more common in cats with FIV.
Updated on September 23, 2025