Keep your four-legged friend healthy, comfortable and happy with this Sentry Hairball Relief. It uses Petromalt technology to help relieve the constipation, dry cough and the occasional vomiting associated with hairballs. This hairball treatment for cats works as an intestinal lubricant that helps prevent the formation of hairballs and eases the passage of hair that is ingested. It is safe and effective for cats and kittens over 4 weeks of age. This hairball treatment comes in a malt flavor and is packaged in a 4.4-oz container.