IMO it is a bad idea. I know a dog who has some serious OCD shadow chasing issues that developed from someone "playing" with a flashlight with him. The problem isn't of the dog not knowing where the light/shadow comes from, it's that such play gets the dog to notice lights/shadows in a way they normally wouldn't have. OCDs aren't caused by the dog not knowing where the light/shadow comes from. It generally starts with something the dog recognizes such as a flashlight or laser light, Most dogs know the sight of these toys when owners use them. The problem comes when the dog then starts noticing light spots or shadows in every day life. Then you have a dog who "plays" with lights spots and shadows in every day life, the same way they "play" with the flashlight.
I'd say a flirt pole is a much better outlet for this sort of play. You can easily make one from a long horse lunge whip and any long, "whippy" toy. It will offer the same sort of chasing exercise without the risk of developing and OCD.
I'd say a flirt pole is a much better outlet for this sort of play. You can easily make one from a long horse lunge whip and any long, "whippy" toy. It will offer the same sort of chasing exercise without the risk of developing and OCD.