He doesn't usually eat his normal food, because he loves hay so much more. I didn't see any of the normal food and figured we were out, so I didn't worry about giving him any of that. Apparently we did have some and I just deprived him of it for a few days. He's still alive, no big deal.
I also realized one day that his water was gone. I wondered how long it had been gone, but filled it up and he was ripping the dispenser out of my hands before I could even reattach it. He proceeded to drink water for the next 5 minutes, so I think it might have been a little longer than I initially thought. He's still alive, no big deal.
Rephrase: I somewhat succeeded in taking care of the pig while Kaela was away.