Latest guess is some sort of gluten or wheat intolerance. We had a totally gluten-free/wheat free day today and (1) he seemed in a better mood; (2) I finally wasn't pulling green boogers from his nose this afternoon (to be fair he did have a cold - my DD has it now) and (3) he only had 2 BMs today instead of 3+ and they were much more normal than usual. Could be a one-off, not sure. Today's eating was:
B: few bites of a toasted gluten free bagel with butter, pouch of sweet potato/apples/corn
L: 1.5 pieces toasted gluten free cinnamon raisin bread with butter, greek yogurt with honey and bananas
S: freeze dried apples and pears
D: gluten free pizza crust topped with chopped mushrooms, spinach, onions and garlic into sauce with blended carrots and sweet potatoes and topped with cheese before baking (he was hungry and didn't seem to notice it was gluten free and had a lot - for him anyway); pouch of broccoli/pears/pears
He drank his normal fresh fruit drink I make for him with blended avocado. Today's was strawberry/banana/apple juice/water/avocado. Plus maybe 1-2 ounces lactose free milk