That's a contradictory statement. If to save the life of a polar bear, and denying the natural cause of death is selfish. That also must indicate that eating animals for food is as selfish. They die from an unnatural death. I also don't understand how it can be selfish when we're not polar bears. It still makes no sense to say self-serving. It creates contradictory towards your statement yet again, isn't the eating of an animal self serving of ones self as well?