Swivel and looping tags work well for lambs and are easier to read than brass tags. Temple tags have an open end to prevent ripping of the ear. However, you must punch a hole in the ear before inserting the tag, plastic tags that come in many different sizes, shapes, and colors. They are easier to read than other tag types. Retention is fairly good, but declines with larger tag sizes. Most companies make smaller tags for sheep and lambs.