Feline lower urinary tract disease (FLUTD) encompasses multiple conditions causing dysuria, haematuria, and inappropriate elimination. Understanding the multifactorial causes enables integrated preventive management.
FLUTD includes feline idiopathic cystitis (FIC, most common—60-70% of FLUTD cases), urolithiasis (struvite or calcium oxalate stones), bacterial urinary tract infection (uncommon, more frequent in older cats), urethral plugs (sterile mucus and crystal matrix causing obstruction), and anatomical abnormalities. Each requires different management; accurate diagnosis through urinalysis, imaging, and bacterial culture guides specific treatment rather than generic "urinary support" approaches.
Male cat urethral obstruction is a life-threatening welfare emergency requiring immediate veterinary treatment. Signs include: repeated straining in the litter tray producing little or no urine; vocalisation; restlessness; abdominal pain; and in advanced obstruction, collapse and hypothermia. Obstruction causes dangerous potassium accumulation causing cardiac arrhythmia; untreated obstruction causes death within 24-72 hours. Emergency deobstruction, fluid therapy, and cardiac monitoring are required—this is never a "wait and see" situation.
FIC prevention through multimodal environmental modification (MEMO) is evidence-based and cost-effective: multiple litter trays (one per cat plus one) in quiet, accessible locations; wet food diet increasing water intake and urinary dilution; water fountains increasing water consumption; stable routines reducing environmental stress; and appropriate social grouping in multi-cat households. These measures reduce FIC recurrence rates significantly and represent the most sustainable welfare intervention.
Struvite uroliths typically dissolve with prescription dissolution diets over 4-12 weeks, avoiding surgical intervention. Calcium oxalate uroliths require surgical or non-surgical removal and prevention through urinary acidification avoidance, increased water intake, and low-oxalate diets. Maintaining urine specific gravity below 1.035 through adequate hydration reduces crystallisation risk for both stone types. Long-term dietary management with prescription urinary diets reduces recurrence.