Fujitsu made a wearable that knows when a cow is in the mood
 

Fitness trackers for cows are nothing new, but Fujitsu's EDSC wearable has a very specific purpose. The company's Estrus Detection System for Cattle, which is being showcased at Mobile World Congress, is designed to help farmers increase the efficien...

http://www.engadget.com/2016/02/23/f...able-for-cows/