Early feline leukemia symptoms are often subtle and non-specific, including lethargy, weight loss, and a poor appetite. The virus progresses through stages, with advanced FeLV signs including recurrent infections, anemia, and certain cancers.
Most cats will show the signs of feline leukemia within a few weeks of being exposed to the virus, but some infected cats don't show symptoms for many years. Feline weight loss is common and can have many causes.

Learn to identify the early warning signs of feline leukemia in cats, including fatigue, weight loss, and respiratory problems. Discover treatment options and prevention strategies for this viral disease.

Learn about the common and advanced symptoms of feline leukemia, including weight loss, lymphoma, skin lesions, anemia, and organ failure. Understand how to diagnose and manage this viral disease.

Recognizing cat leukemia early will ensure appropriate treatment starts as soon as possible. Sometimes going unnoticed for years, feline leukemia is initially caused by exposure to the feline leukemia virus (FeLV).