Feline Lower Urinary Tract Disease Home>Animal>Mammals>Cats>Conditions_and_Diseases>Feline Lower Urinary Tract Disease     Web Pages Feline Cystitis Provides answers to frequently asked questions about FLUTD, also known as feline urologic syndrome (FUS). Feline Lower Urinary Tract Disease Fact sheet about this disease from the Cornell Feline Health Center. FUS (Feline Urinary Syndrome or FLUTD) Answers to frequently asked questions about this disease including symptoms, causes and management of the condition. Feline Lower Urinary Tract Disease Description of FLUTD including symptoms, causes, methods of diagnosis, treatment and prevention from the Feline Advisory Bureau.