sentences:  These nose rings (usually made of plastic) clip onto the nose without piercing it, and are reusable.Self-locking or spring-closing show-lead nose rings, also called "bulldogs" or nose grips, are removable rings that do not require the nose to be pierced.They are often used on steers and cows, along with a halter, at agricultural shows, or when handling cattle for examination, marking or treatment.