Fipnil Spot-on Solution for Small Dogs Fipnil Spot-on Solution for Small Dogs treats flea & tick infestations in dogs weighing between 2 & 10kg. It contains Fipronil, the same active ingredient as Frontline, to protect against new infestations of adult fleas for 8 weeks & against ticks for 4 weeks. It can also be used as part of a treatment strategy for the control of Flea Allergy Dermatitis (FAD) where this has been previously diagnosed by a veterinary surgeon. Fipnil Spot-on Solution for Small Dogs is suitable for puppies from 2 months of age. Animals should be weighed accurately prior to treatment to ensure that they receive the correct dose.