It only takes ONCE! They'll learn to open the bag, so you'll go to the plastic canister. They'll learn how to flip the flap, so you'll go to the plastic JAR. They'll learn how to unscrew it. DO NOT ASK ME HOW I KNOW THIS, but it has something to do with why Hekitty resembles a furry soccer ball.I bought Boone and Gracie treats for the first time last Thursday. They have already learned what it sounds like when the bag gets shook. They came running.