You disappoint us, human.

Wow.  The last time I got that look was when I mixed some mint tea with their oats and served it to them mistakenly thinking that if they liked them separately, they would really like them together.
(In my defense, I was just trying to get them to eat due to tummy troubles.  I had managed to make their favorite treat taste horrible!)
Anyway, I still don't know what I did wrong, but I feel my comeuppance is upon me.