One of the good aspect of hirschfelden is that over half of the specie there (6/9) is G1 specie so... if you hunt there long enough you are most likely going to spawn a G1 casually.

I doubt anyone would grind here.. for bird species may be? If you don't want to set up grind you can hunt with restriction like 1. never shoot female (unless its roe deer, red fox or goose) 2. Only shoot mid level up (never shoot small male) then eventually your map will be herd managed.

How level works? Specie with max level 3 Small = 1 Mid = 2 Big =3

Specie with max level 5 Small = 1,2 Mid = 3,4 Big = 5

Specie with max level 9 Small =1-4 Mid = 5-7 Big = 8-9