This group is for discussion of cats with FLUTD (Feline Lower Urinary Tract Disease) which was formerly known as FUS. Symptoms of this disease include: struvite crystals, calcium oxalate stones, urinary PH that is too acidic or too alkaline, repeated UTIs, Interstitial Cystitis, blockages in the urinary tract, bladder stones, etc.. That's Louis to the right. He has FLUTD.