Livestock weighing scales in the agricultural industry .Animal scales are an important quality control tool in the agricultural sector. Livestock scales include special scales for pigs, sheep and cattle. Most models are designed to weigh a single animal, while others cater for groups of animals. As a rule, single animal scales are portable and are generally used for large livestock such as pigs, cattle and sheep. These scales are often also used as sorting scales for gilts (checking the udder). Group animal scales are stationary scales that are used mainly for fattening pigs. Often an entire pen is weighed together. If animal scales are used to select animals for slaughter, the scales can be equipped with a traffic light system to make it easier to sort the animals by weight classes.