I noticed when checking to see if my food achievement pet was hungry, that some of my pets are down 1-3 points of hunger, despite being in the resort (and yes, the pets page says they're all still in there).

I thought it might have to do with training them/the new training thing (since I trained pets for the first time in a while + my feeder pet was actually hungry despite the glitch going on, since I train him too, and he was also in that 1-3 food point decline), but some of my pets who are down have never been trained. They seem to be fluctuating a bit too, up and down, since some of the numbers have definitely changed since when I first looked.