A horn growth stunting device comprising a main housing defining a main chamber and terminating in a horn bud engaging distal rim defining an open mouth to the main chamber, a gas catalytic element for converting fuel gas to heat and being configured to generate a hot gas stream, a means configured to direct the hot gas stream from the gas catalytic element into the main chamber and towards the open mouth thereof, so that when the horn bud engaging distal rim of the main housing is engaged with a horn bud of an animal, the hot gas stream is directed onto a portion of the horn bud in the open mouth.