Anti-hairball paste for cats. Hair that long-haired cats swallow while grooming can accumulate in the digestive system of cats over time, causing hairballs to form. Spectrum Malt paste ensures that these swallowed hairs are removed from the digestive system without any problems. The malt paste contains natural barley, vegetable oils and dietary fiber. The fine malt facilitates the passage of swallowed hairballs and indigestible materials through the digestive system.