: 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.
Discourage and prevent flies from hanging around to prevent maggot infestations. When flies find a hospitable place to hang out, such as a garbage bin, they lay eggs that hatch into maggots. While keeping garbage covered and unattractive to flies can help prevent the problem, you still need to eradicate any maggots that have appeared. But don't reach for a bug bomb; simple table salt is an inexpensive and easy solution.