With new USDA regulations requiring electronic I.D. ear tags for some cattle, it has led to some farmers looking for the best option. There is a tag that was created that meets these standards and even detects signs of sickness in cattle before it occurs. The tag can also detect when a cow is in heat and sends an alert to your phone. Gerard Griffioen, the owner of CowManager explains what gave him the idea for this type of tag and how this small tag is able to do so much all from the cow's ear.