A complete flea and tick treatment for dogs, with instant and prolonged action. Keep fleas and ticks off your dog with fast-acting, long-acting ULTRUM Ultimate spray. With its fast-acting action, you'll see the pests falling off your doggo. A complete flea and tick treatment for dogs, with instant and prolonged action. Keep fleas and ticks off your dog with fast-acting, long-acting ULTRUM Ultimate spray. With its fast-acting action, you'll see the pests falling off your doggo.