Small White pig Small White pig The Small White or Small Yorkshire was a breed of domestic pig originating in the United Kingdom and which was common during the nineteenth century. It is now extinct, but its characteristics were used in producing the Middle White and other breeds. The Small White was developed in the early nineteenth century by cross-breeding the traditional Old Yorkshire, a large white pig, with imported Chinese pigs. This created a small animal with a pure white ground colour, pricked ears, the short, wide head of the Chinese breeds and their characteristic short upturned snout. In common with the
Cryoconservation of animal genetic resources are keys to successful collection of semen. There are several styles and types of artificial vaginas that can be used depending on the breed and species of the male. During this process the penis enters a tube that is the approximate pressure and temperature of the female's vagina. There is a disposable bag inside the tube that collects the semen. During this process it may be beneficial to have a teaser animal—an animal used to sexually tease but not impregnate the animal—to increase the arousal of the male. Electroejaculation is a method of semen collection in the cattle industry because