I think it is just wonderful that you have given this little dog a lovely home but I hope you don't mind me mentioning one thing, you may understand what I mean or you may disagree as you own the dog.... I would personally never let a dog chase a light beam, the dog will then most likely start chasing any natural reflections etc, it is not a substitute for exercise, it just works the dog into an uncontrolable frenzy and then you will not be able to stop the behaviour, I have seen dogs doing this and the owner is at a loss as to what to do.... I hope you don't take offence. Otherwise it sounds as if you are doing a fantastic job and I applaud you X