For the ants we went full force with the chemicals, Ortho Home Defense Max. Two months later and we are still good. Crossing my fingers because they said it lasts for 12 months. And we only did the outside of the house we didn't do the inside, the instructions say to do in and out. But with the cat I didn't want to be responsible for it having issues (the instructions say just keep pets away while it is wet but when it dries it is fine, but I don't know that I trust that) if you know what I mean, I want the cat gone but not like that. I told my DH if the outside spray is not enough then he had to do the inside spraying since I did the outside.
I will look into the the steel wool as well, and I did read one thing on line that said chicken wire and the spray-able expanding foam.


