After reading posts here about the fun to be had with laser pens I got one for Luca. He went absolutely crazy chasing the light, it was hilarious to watch. However, he is totally obsessed with it. I had no trouble getting him back to me, he just chases the light back to my side but when I stopped it he was going mad running everywhere trying to find it, ha was deaf to everything and wouldn't even take chicken from me (totally unheard of!) Whilst it wore him out I'm concernred that it might be stressful for him and not such a good idea. What does anyone think, harmless fun or damaging? Thanks.