We use robocan, the 100% natural pyretherin.. and that is fine and dandy with having pets in the home, being natural. I hate fly sprays, such as raid and anything potent like that... the robocan works well, flys etc hate pyretherin, hence why some people keep pots of marigolds around their doors outside etc... effective fly deterrent apparently. We used to get pestrol of which was also pyretherin... are they still pyretherin?, haven't used pestrol for years, had to have refills sent and it was easier just having a system that I could go out and buy a refill rather than order and wait for it to arrive via mail.