[Vigilanteman]

I see this as spite for rejecting the authority’s diktats. Why euthanize if it will die on its own after a possible parent rejection?

You see it correctly. The answer to your question is contained in your first statement.

Bison aren't the brightest beasts on the planet, but they are related to cows, most of which would eventually claim their offspring once their milk filled tits started hurting.

Are they going to hunt down and euthanize the mother because she will probably get mastitis?

[nitzy]

Are they going to hunt down and euthanize the mother because she will probably get mastitis?

They should probably euthanize the whole herd to prevent something like this from happening again.

[antceecee]

Agree!