So this sale of text can't be changed?
Next Congress, I'd guess. But why change it?
What are you going to do with the old, infirmed animals and those that aren't adopted. The land can only support so many animals then they over graze the land become malnourished and disease infested.... Better to move a selected few on and keep a viable healthy population.
If the human being is going to get in the way of nature doing it's job and attempt to manage a herd then they should at least try to follow natures natural progression. jmo.