What should I do if my cat keeps going to the litter box but can’t pass stool or urine?
Expert Answer
A cat that keeps going to the litter box but can’t pass anything is usually showing signs of urinary blockage or constipation. If it cannot urinate, the cause may be a urinary tract infection, urinary stones, feline idiopathic cystitis, or a urinary tumor, and it needs prompt abdominal imaging and a urine test at the vet.
If it cannot pass stool, the constipation may come from a blockage, weak intestinal motility, or insufficient water intake. Try giving the cat more water, plus a little yogurt, honey, or hairball paste to stimulate bowel movement. For more severe constipation, a suitable amount of lactulose may help.