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Sorry, I don't recall much, this is very faint UK memories from the 1970's, I think it was a novella in an anthology.
The protagonist is (I think) a native bearer with an Earthmen hunting party. He is on a diaspora colony world that has, a few years before he was born, been found again by an expanding Terran Empire.
On this world there is a fierce creature (zero memory of a description) and, to be classed as an adult in their society, you have to single handedly kill one of these creatures. Once you kill one you get a dot tattooed on your forehead, some veterans have three or four dots. .
Once Earthmen heard of this their big game hunters excitedly came from all around the galaxy and soon there was a shortage of the beasts, the planetary rulers imposed quotas and tariffs to ensure a steady income, what this means is people like the protagonist can't afford to hunt a creature and thus attain adulthood.
The other bearer's on the safari sneer and call him Blanky (or Blankie?) I think (not sure) that a crisis happens and he then shows his bravery in what will become a new adulthood ritual.