[DoubleCribble]

*mostly grass fed but with other supplemental feed.

Mad cow disease propagates from feeding cows the ground up bits of other infected cows.[0]

[0]https://www.fda.gov/animalveterinary/resourcesforyou/animalh...

[wil421]

There has been 6 cows infected with mad cow disease in the US[1] and only 4 cases in humans.[2]

[1]https://www.cdc.gov/prions/bse/bse-north-america.html

[2]https://www-m.cnn.com/2013/07/02/health/mad-cow-disease-fast...