Thanks, I have had this on my mind for quite a while now. It's so strange, he can run on his toes, and goes up/down the stairs without any problem. But the drop is there on flat surface. It has not caused him to trip, or fall, or hinder him in any way. I am going to have a hard night tonight. Don't think will be discussing it with mom, either. He hss been feeling really great lately, so best let it last. I also have another question: dad gets hungry quite often - could it be that all the antioxidants and supplements are causing more rapid energy/burning in the body/cells and the muscles need more fuel? He is eating very well, healthy and clean food, but we have never been big eaters, so this is somewhat odd. As soon as he feel hingry, and does not eat, he feels weak all over and then, after meal, compeltely re-charged. Is this normal? I would like to think that the body is functioning more efficiently with the strict diet/nutrients regiment - but not quite sure.