wrote:
W. Leong wrote:

One time I came home from vacation and found lots of dead flies on
the floor.
It was gross. Rusty was boarded at the vet, so he didn't get to eat
them. My windows are all closed so I don't know how they got in.

Probably there were fly eggs someplace from earlier, and they hatched
while you were gone. A disgusting thought, I know, but probable.

Joyce

Especially since flies lay their eggs on dead animals, and the eggs hatch
into *maggots*(that eat the dead animal) before they pupate into flies