The original hairball remedy for cats. Cats and hairballs...when cats clean themselves their tongues often pull loose hair from the coat. When swallowed it can accumulate in the gastrointestinal tract. This nearly indigestible material become a hairball which can interfere with normal digestion and elimination. Symptoms of hairballs include constipation straining during a bowel movement dry cough and vomiting after meas. The use of Petromalt and regular brushing of the cats coat will generally eliminate these problems.