It is my belief that the ants are developing a resistance to Terro. Somehow it is entering their little ant bodies sending resistance to future generations. They drink at the trough, but they keep coming back –ants on dogs, ants on me. Yesterday I lost control and killed 15 ants before I finally stopped finding them. Today an ant charged me in the kitchen. Most of its kin run from feet. Other humans verified the charging ant. One thought it was his reincarnated grandpa, and we all stepped aside.