Absolute winner!
Pan, our seven year old rescue cat, had gut trouble. He'd pass, usually in the same sitting, some stool that was too dry and some too wet. Sometimes there was a small quantity of bright red blood too. The vet advised a change of diet, adding "you get what you pay for". Unfortunately we'd tried four other foods before this one, prescription and naturally hypoallergenic, which were either unpalatable or made no difference. Weaning on to Gastrointestinal took four days. Huge improvement .