Beaphar FIPROtec® Spot On Solution for Large Dogs kills fleas and ticks on large dogs and continues to kill fleas for up to 5 weeks and ticks for up to 4 weeks. It is important to establish a regular flea control routine for dogs and the household. Dogs who spend a lot of time outside are especially at risk from fleas and ticks. Suitable for dogs over 12 weeks of age and weighing between 20-40kg.