In light of the discussion here, I assume that no one has ever come up with an alternative to killing them.

If they are useless, kill them. When we are done inflicting pain and suffering to further the ultimate species, kill them.

I wonder, if there are any members of the ultimate species that are useless.

Is it possible that any member of any species is useless?

Is right to life dependent upon use?

Is this where all the "industries" spring from (the pork industry, the beef industry, the milk industry, etc.)

Is the human over-population of the planet due to "the human manufacturing industry"?