Its always greyed out.
I think you need to be more compassionate than callous. I’m not sure since it’s been a while since I played CotV.
I think, but have not fully tested, that you have to first have your master as the one being pinned, then choose to save him. To my knowledge that is the -only- way to get the reluctance to feed from the soldier option, which I have a feeling might be the first step needed.
Then, when Estefania ask, lie at first, then pick animal.
If I am mistaken about that “first step”, please someone correct me.
High willpower is also needed
I got it with 3 willpower and Carlos as a maker. He was trapped.