Constipated cats strain repeatedly and pass dry hard pellets or nothing, sometimes mistaken for urinary trouble; checking what is actually produced is the key distinction.
Common triggers include low water intake, hair accumulation, inactivity, and old pelvic injuries, with seniors and kidney patients more prone through dehydration.
More wet food, multiple water stations, play, and regular brushing are safe prevention; for mild cases, ask the vet about hairball paste or fiber adjustments.
No stool for over two days, vomiting with abdominal pain, or uncertainty about urination, especially a male cat straining with no output, means same-day care and no home enemas.