Beaphar FIPROtec Spot-On for Extra Large Dogs kills fleas and ticks on extra large dogs and continues to kill fleas for up to five weeks and ticks for up to four weeks Suitable for dogs over 8 weeks of age and weighing between 40-60kg Dogs who spend a lot of time outside are especially at risk from fleas and ticks It is important to establish a regular flea control routine for dogs and the household Always use a household insecticide when tackling a flea problem