 Hey Yoon
Fleas stay on the pet only 20% of the time, so even if you put Frontline, the fleas are probably jumping on & off them all the time. It takes 3 consecutive applications once a month to get it to work effectively (even tho it says every 3 months for fleas, I think). You need to treat the house, bomb it & vaccume the carpets, that's where they hide & lay the eggs. It's flea season right now, so when they go outside, I see fleas jumping on them! Eeeew |