The practice of feeding pigs and chickens the bones, brains, meat scraps, feathers, and feces of their own species remains legal and widespread in the United States. 

This is extremely dangerous since the Mad Cow disease can still infect even after exposure for an hour to a temperature of 680 degrees (enough to melt lead) and can withstand antibiotics, boiling water, bleach, formaldehyde, and a variety of solvents, detergents, and enzymes known to destroy most known bacteria and viruses. Sadly, it is literally incalculable the amount of people infected with this disease since it can take as much as 10 to 30 years to show symptoms. Mad Cow disease progressively destructs brain cells, leading to dementia and death, the mortality for the disease is 100%. You can catch the disease by eating brains or spinal cords of infected animals, and also by contact with infected blood, organ donations, or contaminated surgical instruments. Also, in the factory farms, animals are fed the remains of other infected animals, thus contaminating all these animals and the thousands of people who will later eat them. Also, the method of air-injected stunning used in most U.S. meatpacking plants drives central nervous system tissue from the brain into the bloodstream of cattle.  

Out of 900 million US cattle slaughtered in the last decade, the USDA only tested 12000 for Mad Cow disease. Yet in one U.S. study, when people diagnosed with Alzheimer’s disease (whose symptoms can be difficult to distinguish from Mad Cow’s disease) were examined after death, 13 percent of the presumed Alzheimer’s victims actually had Mad Cow’s disease. 

Four million Americans are currently diagnosed with Alzheimer’s.