[Ellie May]

I would wash any Hartz flea product off immediately with cool water and a dish detergent like Dawn (unless it's already absorbed - then too late). These products are highly toxic. If it was used in the house, don't let the furkids near it.

Trifexis and Advantage Multi are really just adulticides. they aren't really the first choice for breaking the lifecycle. I'd be going with Frontline Plus (but you'll have to find out if you can use it after having used a flea shampoo already today).