This is a great video:
http://www.chooseveg.com/animal-cruelty ... PAod_TN0AQ


Most chickens in the egg industry (who are also part of the poultry industry) live in cramped cages with less than the dimensions of a sheet of paper to stand on all day for their entire lives.
Chickens, turkeys, pigs, and probably other creatures are equally mistreated. They are slaughtered by having their throats slit, after which many of them writhe in pain for some agonizing minutes that are surely worth an eternity. Pigs may be burned alive in order to remove their hair. Cows are herded through cramped cells with electric rods. All of these creatures are given so little space to roam that many of them can't even walk due to lameness. Many of them catch diseases and have huge lesions that have 0% chance of getting treated even as they continue to serve the industry. Chickens live in cages along with the bug-infested corpses of their cage-mates. The chickens you see above have severe feather loss, and many of their bones are broken, because they don't even get enough space to spread their wings. If they are diseased, they may be trampled on by their fellow species. Many get their necks torn off by cage hooks, and others become cannibals. Sometimes they are starved for up to 12 days in order to stress them into producing eggs more quickly.
Many workers abuse the animals for no reason as all, slamming them onto the ground in attempt to kill them. One worker was filmed using turkeys as punching bags while they hung upside down from a conveyor belt. In the U.S., there are virtually no laws against animal cruelty. It is a crime for a human to walk around naked in public, but it is completely legal for millions of chickens to be stripped bone-naked due to abuse. Why are there no laws against animal cruelty? Because it would destroy the meat and dairy industries. Except that there actually are cases of humane animal farms in the industry.
Do you support the industry knowing this?