Your dog need play ? try find this  GoDogGo , tennis ball launcher  for your Dog.  designed to provide hours of healthy exercise and enjoyment for your dog.
GoDogGo was designed to let you choose how much or how little interaction you have with your dog while he’s playing with his new favorite dog toy.
From the remote control, you can set GoDogGo to any one of three modes. In the two automatic modes, your GoDogGo will launch tennis balls to your dog every 7 or 15 seconds. In the manual mode, your GoDogGo will launch a new ball with each press of the button

find it here