Transgenic animals are animals whose DNA has been modified by the addition of foreign genes. Common transgenic animals include goats, mice, rabbits, sheep, dogs, and monkeys. Transgenic goats have been used to produce human proteins like antithrombin and alpha-fetoprotein in their milk. Methods for creating transgenic goats include somatic cell nuclear transfer and pronuclear microinjection. Transgenic mice and rabbits are also important research models, with mice commonly used to study gene function and model human diseases, while rabbits can produce human proteins and antibodies for therapeutic purposes. Transgenic animals have applications in pharmaceuticals, agriculture, biotechnology, and research.