I get so sick of the neighbor's dog getting into our well sealed garbage cans. I was over to my mother in law's and she was telling me down in Florida her neighbor picked up a motion activated ultra sonic critter repeller. Anytime at night when something goes to get into the garbage cans an ultrasonic tone goes off which sends the critter scrambling. I definitely need one of these. Its only 18.00 dollars at Heartland America.