Kamar Heatmount Detectors 25/pkg

Glued onto the tail of a cow. When a cow wearing a detector is mounted by a herd mate, constant pressure from the brisket of the mounting animal turns the detector red. This leaves a visible indication that the cow stood to be ridden and therefore may be in heat and ready to breed. Other signs of heat should always be watched for to confirm that a red detector resulted from standing heat.