You love your dog or cat. But your pet is a fly magnet.
Flies are obsessed with pet poop. If you have a dog door, that's a VIP entrance for flies. They smell the yard, see the flap, and bam—they bring the outdoors in.
Life Cycle Of Housefly Diagram
Also, a bowl of wet cat food left out for an hour? That’s a neon “Open All Night” sign for flies.
Baby Flies: The Stealth Bombers
Here’s the sneakiest trick. Sometimes, the fly inside was born inside.
A mama fly slipped in long ago. She laid a hundred eggs in your garbage disposal. Or in that forgotten potato under the fridge.
You didn't let a fly in. You let a migrant egg farmer in. The babies hatched later, and now they’re your roommates.