We got a "Go Dog Go" that is similar to this contraption http://www.buygodoggo.com/ . Unfortunately our incessant ball dog (German Shepherd-like thing) won't drop it into the bucket! I don't think he trusts it.
This one looks good for 'dem smaller in stature dogs!
There's no place like 127.0.0.1. But I'll always remember this tiny ad:
Switching from electric heat to a rocket mass heater reduces your carbon footprint as much as parking 7 cars