The dairy industry regularly puts cows on what the factory farmers call "rape racks", because the cows have to regularly give birth in order to constantly produce milk (mammals produce milk after giving birth). These cows are "used up" so quickly on factory farms, that they live only about 20% as long as unfarmed cows. Watch for free Dominion (or download) and Earthlings.

Dairy farms somehow managed to become more cruel than the chicken and fur industry (the latter sometimes skin animals alive because killing them damages the fur, or anally electrocutes them).

The worst 2 industries when it comes to the total amount of pain caused are:

• the fish factory-farming industry which kills more fish than the fishing industry, enslaving them in torturous conditions their entire lives before slowly torturing them to death, and
• the fishing industry which slowly tortures 1-3 trillion fish to death every year - usually by slowly suffocating them to death and/or slowly crushing them to death.