My previous dog could recognize the sound of a tuna can being opened. I started pouring the “juice” from the tuna can into her bowl, so she soon learned to come running when she heard any can being opened. But before long she realized that she’d only get something out of the tuna can, so she’d ignore the sound of large cans being opened but would still come running when she heard the sound of the little tuna can being opened.
My previous dog could recognize the sound of a tuna can being opened. I started pouring the “juice” from the tuna can into her bowl, so she soon learned to come running when she heard any can being opened. But before long she realized that she’d only get something out of the tuna can, so she’d ignore the sound of large cans being opened but would still come running when she heard the sound of the little tuna can being opened.