Royal Canin Feline Hairball Care Adult Cat Dry Food is a precisely balanced nutritional formula designed to naturally help reduce hairball formation in adult cats. Formulated with an exclusive Hairball Care complex — a specific blend of dietary fibres including psyllium (rich in mucilage) and insoluble fibres — this food helps naturally stimulate intestinal transit, allowing ingested hair to be eliminated through the faeces rather than building up in the stomach and being regurgitated.