Yes, our livestock marker crayon can be used as tail-chalking on cows to detect the real heat (oestrus). tail-chaling the crayon on cow every day, don’t forget to leave a smooth finish on the surface of skin,  when the cow is in heat (oestrus), the paint marked on the tail of cow become wrinkles, then we know which cow is in real heat and carry out the accurate and timing insemination.

This livestock marker crayons are specially formulated for easy tail-chalking on cows in a wide temperature range, this animal marker crayon is all weather resistance and can be marked on dry or wet cows.