Can I dehydrate multiple different types of food at the same time?
They would totally end up tasting like oniony beef! In fact your whole kitchen does- that's part of the magic of making jerky.

I can't think of a way to prevent this as the whole idea of dehydrating is to pull water out of the food and blow it away into the air.

If the flavors are compatible (or milder, like fruit) I have done different things together at once. If they don't take the same amount of time, I'll just take the done items off earlier when I check it.