We see things like reciprocity which are fairly central to our view of ethics. But if you're talking about a set of worked-out rules on what we are supposed to do then, yes, it is a human product.

Somebody who eats twice as much factory-farmed products as he or she needs to is clearly doing twice as much damage to the planet. From a utilitarian point of view, that's twice as bad.

The traditional view of the sanctity of human life will collapse under pressure from scientific, technological and demographic developments.

So, basically, my view is I don't want to support the exploitation of animals, and within reason, I will do what I can to avoid it, but it's not like it's a religion for me. It's not like I consider I'm polluted if somehow some bit of milk or cheese or something passes my lips.