I know Hartz is bad. My grandpa said oh, you should get Roxy some of that and I was like NOOO. We did buy this spray from a farm and garden store last summer for horses (but it's also dog friendly) because Roxy had some flies bothering her. It also seems to help with fleas... I know it's not flea medicine, but it worked pretty well.

We can't use the spray on Lily though because the spray isn't supposed to be used around cats.