Evolution
How does the Last Stand event card affect an attack: does the Carnivore still feed, and does Scavenger trigger?
The designer rules that Last Stand prevents the attack, and that Scavenger does not trigger.
The Carnivore gets no food, because Last Stand prevents the attack. If the target has Horns, the Carnivore loses 2 Population instead of 1. Scavenger does not trigger either, since it needs a successful attack.