An identification tag for an animal is provided. The tag includes a male portion defining a shaft, an enlarged portion proximate a first end of the shaft, and one or more sharp edges on a second end of the shaft. The one or more sharp edges are oriented to cut a pathway for the shaft through material contacting the second end of the shaft. The tag also includes a female portion defining a recess. The recess is configured to connect to the second end of the male portion.
