This crayon fits the marking harness we sell. It leaves an obvious mark on a doe. All colors will show on Boer goats. For dairy goats or Pygmies, choose a color that will show up on their coats. Available in red, blue, green, yellow, and orange. Also, choose the crayon that suits your climate. Mild climate is for temperatures between 60 - 85 degrees F. Cold climate is for temperatures below 60 degrees F. Hot climate is for temperatures between 85 F - 100 degrees F. Be sure to specify temperature and color choices.