 There are several systems that can be used to identify goats and sheep. The most common methods include air tagging, tattooing, and air-notching. Each of these systems ensure that a unique number or symbol is given to the animals so that they can be identified. In this video, air-notching will be demonstrated. Air-notching requires an air-notching tool. You recommend the use of the V-shaped notcher. The tool must be cleaned before use and sprayed with alcohol. The numbering system used for notching is unique to the farm. Notching should be done within the first week after birth, as during this time there will be little to no blood. For this demonstration, we will use the following method. The right air represents the ones, and the left air will represent the tens. On the right air, a notch at the top represents a one, a notch at the bottom represents a three, and a notch at the tip represents a five. On the left air, a notch on the top is a ten, a notch on the bottom is thirty, and a notch on the left air tip is fifty. We can use any of these combinations to create the numbers needed. The number given to this lamb will be sixty-one. A notch is made on the tip of the left air, fifty, then another notch on the top of the left air, ten. On the right air, a notch is made on the top of the right air, this is a one. Fifty plus ten equals sixty on the left air, and a one on the right air. This is read as sixty-one.