I have 1, Peake, that goes nuts for the light, at 9:00 pm every night he will come and sit in front of my chair. This is the signal that its times to play. As he starts going from one side of the room to the other his brother Mits will join in, but only for a few secounds, then Chessie, the coon cat will swat it if the light comes close enough that he DOES NOT have move his but. The other five could care less.