Two to three times a day, a worker grabs each bird, shoves a long, thick metal tube all the way down his throat, and an air pump shoots up to two pounds of corn mush into his esophagus. The industry always refers to the dry weight of the feed, which is about one pound per feeding. Adding oil and water doubles this weight, making it 20-30% of the bird's healthy body weight. Picture 30 one pound boxes of dry pasta and then add water. This is proportionally how much a 150 pound human would be force fed using this formula........A duck's liver naturally weighs around 50 grams. However, to qualify as foie gras, the industry's own regulations require ducks' livers to weigh an absolute minimum of 300 grams.
The vast amounts of feed pumped down the ducks' throats causes enormous internal pressure, and the pipe sometimes punctures the esophagus, causing many to die from choking on the blood that fills their lungs. Some birds literally burst, choke to death on their own vomit, or become so weak that they are unable to fend off rats from eating them alive (click to see footage from Sonoma Foie gras--requires Windows Media Player). Other ducks die a slow, painful, and premature death by suffocation from inhalation of regurgitated feed. In fact, because of the massive toll taken on the birds during the force-feeding process, the average pre-slaughter mortality rate is up to twenty times higher than on other duck factory farms, according to the European Union's Scientific Report on the subject.