FUS (Feline Urinary Syndrome or FLUTD)
   Answers to frequently asked questions about this disease including symptoms, causes and management of the condition.
   http://www.sniksnak.com/cathealth/fusfaqs.html

Feline Cystitis
   Provides answers to frequently asked questions about FLUTD, also known as feline urologic syndrome (FUS).
   http://www.homevet.com/petcare/cystitis.html

Feline Lower Urinary Tract Disease
   Fact sheet about this disease from the Cornell Feline Health Center.
   http://www.vet.cornell.edu/fhc/brochures/urinary.html