Cattle are visible at a feedlot in Summerfield, Texas, USA. Once the animals reach a weight of 650 pounds, they are moved to these facilities and placed on a strict diet of specialized animal feed. Over the next three to four months, the cows gain up to 400 more pounds before they are shipped off to slaughter. The lagoon seen at the top of this feedlot gets is glowing color from a high concentration of manure and chemicals.