There is growing interest among farmers in tagging newborn calves with EID ear tags. These tags can be read both visually and by electronic readers. The bovine EID tags on offer from Mullinahone, Cormac and Datamars meet all identification requirements of the Department of Agriculture. EID tags were first offered in 2013 and 25,000 sets sold. In the 2017-2018 season over 200,000 sets were sold. Most of this interest is from dairy farmers for the following reasons: