He will return after he has finished to eat what is left in the bowl (at a later time) but ignores the food on the floor. Why does he do this?
I have also seen him nose his blankets or bed if he is either about to lay down or is very anxious.
Also, almost forgot this, he will put a kibble or two in his water bowl. Again, doesn't eat it, just leaves it. And he doesn't do it every day, just every now and then. I would say between 1 time a week and once every 3 weeks. It varies.