> The Association of World Reindeer Herders is a voluntary civil society organization for all the 24 different nomadic indigenous peoples who make a living from reindeer herding across 10 nation-states in the circumpolar north, formally founded during the 1st World Congress of Reindeer Herders in 1997.
These seem to be either domesticated or herded on certain territories by natives. So spray painting a herd may not be as hard as it sounds.
From https://reindeerherding.org/world-reindeer-herders
> The Association of World Reindeer Herders is a voluntary civil society organization for all the 24 different nomadic indigenous peoples who make a living from reindeer herding across 10 nation-states in the circumpolar north, formally founded during the 1st World Congress of Reindeer Herders in 1997.