Hey Mike, you can put in the bangle tags now. We do. It helps when the state comes to do their annual inventory. I'd be worried about collars catching on something and choking them. Or breaking their neck trying to get away. We use the smaller lamb tags. You can order them on line in different colors or if yellow is ok with you Tractor Suppy has them.
Sandy Malone
Pasture Prime Farm
Rush, NY