A few years ago my 55 year old house was discovered by the rat population in my neighborhood. As with any old house, there are many cracks & avenues a varmint could use to gain entrance.....and they did. I'm not sure just any company would have gone to the lengths Haynes went to to get rid of the problem. They mean it when they say they will keep coming until the problem is solved! Many thanks to everyone at Haynes.