My puppy, Whiskey, had to spend the day at the vet so I took his toy to keep him company. He knew he had to sit before I'd give him his toy. I showed him the toy and he sat down. I gave him the toy. He immediately dropped it and stood up. I showed him the toy and he sat down again. I handed him the toy. Again, he dropped the toy so I'd pick it up. The Vet was laughing. Whiskey had taught me how to fetch!