The info is on the database, not the tag. If your drug buying records don't match your cattle records you will be in it deep.What puzzles me is, if an EID tag is applied to a calf at birth, who puts any further information onto that tag regarding any medical treatment that animal might receive in future. And if it looses that tag, is all the information lost.
And if the information on the tag was supplied by a farmer, who believes it anyway?