Horse Blood
On September 30, 2003 a trailer came loose from a truck from the Dallas Crown horse processing plant in Kaufman, TX, spilling horse blood.
These images are from a website with information about horse slaughter. Some of the site is a bit gruesome and extreme. I was surprised to learn that in the US over 94,000 horses are slaughtered for export and an additional 20,000 are sent to Mexico and Canada for human consumption.