Proven to work and plant-powered with a fresh peppermint scent, Flea & Tick Pets + Home and Collar make up this bundle for dogs. As seen on Shark Tank, the spray kills, repels, and prevents fleas, ticks, and mosquitoes while the collar adds a convenient layer of ongoing repellency, lasting up to 4 months. The spray is safe for dogs and cats of all ages when used as directed and the small/medium collar (fits up to a 21" neck) is for dogs 4 months or older.