Why do flies like cow poop?

Flies like animal fecessuch as dog, cat, cow, or horse poopbecause these warm, moist areas are the ideal spots for laying eggs and give the larvae something to eat while they develop into pupa. Flies land on the piles of excretion looking for mouth-watering bacteria, which provides them with a meal. Although it sounds disgusting, it's the fly's job to take the disease-causing bacteria and eat it up. However, because of their habits of being attracted to feces and decaying meat, flies often carry diseases such as dysentery, typhoid fever, and cholera.