A friend of mine uses a laser light to get her cat in the house and said that she thought my dog would like one (she has a dog too that chases the cat and the laser light).
The laser has become potty time's best friend at my house! Bear gets a long walk in the morning and in the afternoon, but his 8ish potty can go anywhere from 7 to 10. I take him out several times, but it just comes when it comes. And with winter coming - this is no bueno!
Now, we go outside, Bear chases the laser for two or three minutes (he LOVES it) and the running stimulates the poopy time! Everybody wins!!
It also works great to get him into the house, he chases the laser right in!