: 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.
The maggot's role is to eat. Maggots begin eating whatever it is they are laid near and prefer rotting vegetables, manure and dead animals. After between 4 and 10 days of this feeding frenzy, maggots ready themselves for the next stage: pupa. The maggots typically migrate to a high and dry location to begin the pupa stage. The maggots make a reddish-brown shell around themselves.