HELP! My sims won't eat

I have no idea why, but my sims won't eat. I can have them make food, but when I get them to take a serving, they just put it on the floor and don't eat it. I had my sim make a microwave meal, and he just left it in there until I commanded him to empty it, which caused him to immediately throw it in the trash. They simply refuse to get a quick meal, and occasionally will do the reset sim animation when I command them to eat. I tried resetting the sims multiple times, and still nothing. The lot I'm playing on has lots of stuff (64x64 lot), but it's never been a problem before.

In short: My sims refuse to eat at all. Please help.