: 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.
Maggots are regularly used for medicinal reasons. The most common type of medicinal maggot is the bluebottle larva. Sterile maggots are inserted into wounds so they can eat away the dead and rotting flesh to aid healing. Maggots are also used as bait in fishing. Their movement and color attract fish to the hook.