I have never heard that they were dangerous and bought ours at the vets suggestion He said it would give them more exercise than any toy he knew of. I will try to read up more...I do know that we try not to shine it in their faces and I have had it bounce off the mirror into MY eyes and you can't look at it for long!! I would keep enjoying the fun they have and just be cautious about the eyes is all. Too much fun to be had when a little caution will prevent any possible harm