Tail painting is the most popular way of detecting heat in cows. So why does it still take so much time and effort? With the Tailpainter, you can tail paint a cow in a few seconds, from a place that is easiest and safest for you. This Roller 3-Pack allows you to replace rollers that have been worn out. We recommend using a water-based tail paint. Watch this short video on how to replace the paint roller in your Tailpainter Applicator.