Causes
Plugs of crystals and mucus, stones, spasms (common in feline idiopathic cystitis). Males have a narrower urethra and become obstructed easily.
Diagnosis
Examination: the bladder is felt to be very full and hard. Blood work to assess the damage. Diagnosis must be immediate.
Treatment
LIFE-THREATENING EMERGENCY: sedation and catheterisation to relieve the obstruction, fluid therapy, correction of the imbalances. Hospitalisation. After the episode, prevent relapses.
Prevention
In male cats: wet food, plenty of water, reducing stress, clean litter trays, a healthy weight. Always watch urinary habits.

