My cat started over grooming herself and pulling her fur out a few days ago, took her to the vet and it turns out she has fleas again even though I've treated her and her sister with frontline plus monthly and there were no signs of fleas a few weeks ago when she got her booster vaccination. We had an infestation last year and I treated the cats, house and set a monthly calendar reminder for frontline spot on but they're back again. Vet has recommended bravecto and RIP Flea spray for the house, I really hope it works because these seem to be some breed of super hardy frontline-immune fleas. My house now stinks like a chemical spill from the spray.