5kg Ginger Tom
I have a 7 yr old who spends a lot of time outside, at least during the warmer weather. I have been using a vet prescription for many years which was getting so expensive. Initially I alternated vet with frontline 3 until I moved over fully. I dose every month and have not noticed any deterioration with his cover. His light fur is clear of fleas and eggs. Very occasionally he has picked up a flea, but they don't bother him beyond a day, so I assume Frontline has worked.