Healthy sows are vaccinated, live with infected pigs, and remain healthy and give birth after more than two months.
Having Down syndrome, these animals are physically and intellectually disabled, unable to keep up with their fellow humans and often die early.
Palestinian officials say in the past two weeks, nine Palestinians in the West Bank have died from the A / H1N1 flu, while the number of these cases has reached 187 people.
Researchers at the University of Cambridge have developed a new technique for estimating the severity of pain in sheep, called the Sheep Pain Facial Expression Scale (SPFES).