Description Designed as an aid to help detect estrus and standing heat in breeding cows and heifers. A friction-activated patch that is easy to apply, highly visible, extremely accurate and works in all weather conditions. Just apply the patch to the tailhead prior to standing heat. Then when the cow is mounted, the scratch-off surface is rubbed off exposing the “color signal”. Self adhesive and requires no messy glues. Comes in a variety of colors. 50 dectectors per pack.
