A flock of sheep roam are herded up before being examined with an ultrasound scan at the El Alfalfal agricultural facility, some 80 km ( 49.7 miles) southeast of Santiago August 29, 2008. Some 1,500 sheep were examined with an ultrasound scan as part of an Agriculture Ministry program to optimize and organize the reproductive and productive process in small farms. REUTERS/Ivan Alvarado (CHILE)