Pigs are stacked in cages like cars in a parking ramp. They never go outside. They never exercise or relate to other animals until they are packed into trucks and taken to the slaughter house. Often in sub zero weather or sweltering heat. Terror is all they know on their trip to the slaughter house to become ham for the holiday, bacon and beef for the burgers, and fat for your arteries.
Cattle suffer terribly.
Jammed into feedlots to be fattened before going to the slaughter house, they are sprayed with pesticides and loaded with various hormones and antibiotics through their food and by injection. The suffering of turkeys and chickens is as bad. They are more than likely raised in packed confinement barns where they are so crazed that their beaks are cut off when they are babies so they don't peck out the eyes of their neighbors. Most never go outside until they are taken to the slaughter house or soup factory. Cows and ducks raised on factory farms experience similar suffering and misery during their entire lives.