How do Zoos do it?

I'm sure the Zoo keepers don't pull out the Dyson five times a day, and get out the Pampered chef scrappers to clean up after feeding times.  Breakfast, morning snack, lunch, Afternoon snack, and dinner end up leaving the table, chairs, and floors a gross mess- everyday.  This morning I was wiping down from breakfast and I bumped the table a little too hard (there is a belly in the way now) and a dried up lo mien noodle fell from underneath the middle of the table.  Ew.  I guess I need to start checking there too.

I've thought about skipping meal times all together, and while that is very cost effective, I am sure it is illegal. 

I've tried to think of crumb-less, not-sticky, healthy snacks- but alas, my children can make a carrot stick a disaster. 

I've given into making the vacuum's home right behind the baby's seat.  I use it THAT much.

I dream of warm weather to picnic and hose them off outside.

Please tell me I'm missing something!