The Chin Ball Marker is an effective heat detection aid for cattle. A rugged nylon strap and heavy buckle hold the poly-vinyl harness underneath the chin of a penectomized bull. The stainless steel ball inside the reservoir works on the same principle as a ball point pen. The coloured ink on the female’s back will give a clear indication of which cow is in heat.
*Ink is sold separately.
Ink available in red, blue and yellow.