Animals have been farmed by humans for thousands of years, but the way in which we reproduce, house, feed, and handle these animals has changed dramatically over the past century.

The rise of factory farms has meant that billions of animals have had to endure a life which can only be described as cruel and barbaric. A life without ever feeling the sun on their back, fresh air in their lungs, and without the freedom to fully extend their limbs, flap their wings, or exhibit their natural behaviors.

A deeper look into the lives of factory farmed animals reveals that we have created a huge prison system for animals where they are no longer considered sentient beings, capable of feelings, thoughts, and pain, but instead are treated as products on an assembly line from the moment they are born to the moment they are murdered.

Here are 10 shocking facts about the lives of factory farmed animals: