Yes, his energy level will come and go. Even this far post TX, some days I feel as though I can conquer the world and others I just want to vegetate because I feel exhausted!!! Some of that is mental as well. I had that exact conversation with a friend over lunch today. (The meal, eggs of course, still one of my favorites) He agreed that I was my own worst critic as far as my speech, physical appearance, etc., so that mental aspect can play heavily into things at this point as well. It's great that he's eating and you got a well deserved break. Great for both of you today!!!
Steve