I've seen this before. My dad had a kitten that would fetch a puffball so he could throw it again. I bought Hecate a twelve pack of balls and such (six plastic jingle balls, three sparkly puff balls, a mini baseball with shiny spots, a catnip fish, and her favorite, a gold tinsel foil ball). She loves to chase them if I toss them across the room, but that would be so much easier if she would bring them back. Any ideas on how I can teach her this?