Tagging your cattle with an individual identification (such as a unique ear tag number) has many management and production benefits. Not only will you be able to quickly verify which cow you are working with (cow 123 instead of "the one with the white spot on her face"), but this helps you (or someone helping you) locate her record in your record keeping system.
By using individual identification, you can also track your cattle's performance. It can be tough when decision-making time comes around to figure out which cows should be sold or culled, but the decision can be more objective if you've been keeping track of a cow's history of calves.
A few other ways individual identification makes a difference:
Individually identify your cows, bulls, and calves to make the most of your production and management processes - the time, cost and resources to individually identify your cattle can easily pay for itself and provide you with long-term benefits.
* Ideas based on: "Individual Cattle Identity Records for Cow-Calf Producers: Ways to Make Records Cost Effective" by James M. McGrann, Lawrence Falconer, and Gary Rupp.