Feline Idiopathic Cystitis – by Kim Halford BVetMed MSc MRCVS of Animal Welfare Matters. Feline Idiopathic Cystitis (FIC) is a cat bladder disorder. Broken down, the name means Inflammation of the Bladder (“Cystitis”) in the cat and no-one knows the cause (“Idiopathic”). FIC is one of the main causes of Feline Lower Urinary Tract Disease (FLUTD) [...]