Thanks, Elk. My girls will enjoy actually going for a jog. I'm with you, a walk in the neighborhood just isn't enough. I used to throw the frisbee for Kali in the side yard, but lately there have been too many strays just appear out of nowhere. One day a horse comes trotting right by our yard and the riders were teens. They didn't even have a saddle and their dogs were running loose beside them and one came charging at us in our yard! Luckily Kali is responsive to commands, but she does have her limits when it comes to protecting her yard.