Yes, the FURminator brush works for long-haired cats. The FURminator Undercoat deShedding Tool is suitable for medium/large long-haired cats. It has the ability to remove loose hair and reduces shedding by up to 90%. Additionally, it helps reduce hairballs and keeps your cat healthy overall. Use 1-2 times every week for 10 to 20 minutes per session on dry hair.