You might watch him for Demintia, the beginning stages of Alzheimers. My mom went through the same thing in the beginning of hers. she use to say a young boy came into her room and held her feet until she fell alseep then left. I don't know where that came from. But having the hine site now, I see the stages she went through. when needed read the 36 hours day. there is a world of information you might need. Best of luck, please read all you can.
Dawn
Steering committee for Alzheimers
Waco Texas