With sadness I would spare the life of the human and sacrifice my pet. Like SC, if I disliked the person, it would be a tougher decision, but I'd probably go with the same choice.

As far as killing and eating my pet to save my life, I don't know that I could do that.

Here's another spin.

Would you sacrifice the life of your pet if it meant that your healthy child(ren) would have a 1 year guarntee from the date of the pet's demise to remain free of serious injury, illness, disease, accident or death?