Ditto on the theory of warm weather means less eating.
We free feed the Tribe and they go in phases (as RICHARD puts it). Some days they eat like horses and other days, don't touch the stuff! Go figure... Lately, there's been a lot of food in the bowls for a long time.

If nothing else is setting off alarm bells in your mind - they are probably just adjusting to the weather and schedule.

But maybe......uhmm, you haven't noticed a lot of charges to Pizza Hut on your credit cards lately have you?