Rabbits could be milked on a mass scale if a pioneering medical treatment gets the go-ahead. The animals have been genetically engineered to produce C1 inhibitor, a protein that occurs naturally in the human body, according to National Geographic. People who suffer from the genetic disorder hereditary angioedema (HAE) do not produce enough of the protein and suffer from attacks of painful swelling in their soft tissues. They can even die from asphyxiation if the swelling affects their throat. Although the protein can be harvested from donor blood, stocks are limited and can carry the risk of a viral infection,...