Pestigon Spot-on dog is a remedy based on firponil to protect dogs aged 8 weeks and up and at least 2 kg heavy from fleas, ticks and biting lice. Pestigon Spot-on does not prevent ticks from latching on, but they are killed within the first 24-48 hours after latching on, because the tick feeds itself. Pestigon for dogs is easy to apply with a dropper and is available in sizes S (2-10kg), M (10-20kg), L (20-40kg) and XL (40-60kg). Dose by weight. In case of flea infestations, it's advisable to treat the surrounding areas as well.