Because business owners only care about profit margines, and nothing about the lives of the animals they use.
It also doesn't help that the factory farms and the food business in general puts a purposeful veil between themselves and their consumers; many people don't realize what the animals go through to produce their food.
30,000,000 chickens - 85% battery hens
About 300 a year
Battery Brooding by Milton Arndt reports on this housing method in 1931.The book is the earliest source to reference the method yet the origins are unknown.
Ray Martin
Its a battery charged farm
A battery cage is a small cage in which a hen is kept to lay eggs.
50000
In 1947
it makes them poo
on average, about 69
battery farm are small cages. especialy, battery cages for chickens are to small
Never mind, those are broiler chickens.