And roger that, Seat 2A, with regard to the non-lethal approach concerning your ongoing squirrel situation!
I have not voluntarily hunted in many years as I do not wish to kill anything these days - and I've even been known to humanely escort certain insects from the inside of our home to the great outdoors where they belong! However, I do draw the line with cockroaches that manage to slip indoors as well as fire ants and their nests outside on our lawn! Those two lawless insect types are always dealt with in a very final manner!
But I do sympathize with your squirrel infestation and realize that, sometimes, one must do what one must do. We encountered the same situation here recently at the country home of my fiancee's sister. She and her husband (who is one of my best friends) live on 400 acres in a nearby parish that is located not too far from the LFT airport. A small river adjoins their property. And an alligator measuring approximately twelve feet in length had become something more than a minor nuisance. In fact, this particular beast darn near killed their chocolate labrador and had also made threatening moves toward some of kids playing by the river as well. Something had to be done in order for tragedy and disaster to be averted. So my very good friend and I, respectively equipped with an AR-15 and an old WWII Mauser rifle, took care of the situation in a very final way. We really did not want to do this but felt it was necessary. And I am now back to escorting innocent insects from our home.