Dehorning paste typically contains two caustic substances: calcium hydroxide and sodium hydroxide. When applied to the horn bud, the paste causes a chemical burn that destroys horn-producing cells. ... When horn-producing cells are destroyed, horns don't grow.

Is dehorning paste painful?

These results indicate that dehorning with caustic paste causes pain, but that the pain is less than that caused by the hot iron, even when using lidocaine.

Does dehorning paste work on calves?

Naylor Dehorning Paste is best used on calves up to eight (8) weeks of age. It is most easily used on very young calves. The younger the calf is when treated, the better. Shock and pain are negligible and dehorning is quickly and easily done.