: an act of showing someone how something is used or done : demonstration. 1  I saw a demo on how to use the computer program. 2  The salesman gave us a demo of the vacuum cleaner, and it seemed to work very well. [+] more examples [-] hide examples [+] Example sentences [-] Hide examples 3
If however, you are talking about some maggots in a bowl of wet food (either canned food or dry food which got wet or which you deliberately added fluid to) it is a different matter. Maggots come from flies eggs and they take some set period of time to hatch from the eggs.
Many people think of maggots as the creepy, crawly larva of a fly. But maggots go through several of their own distinct life cycle stages before maturing into a fly. In the life cycle of all arthropods, there are several molts, or instars, in which the insect will shed its exoskeleton to evolve into a new form.