Some people feel that humans have a right to eat other animals but not to trash the earth. They may choose veganism because a vegan's ecological footprint is light, but once they are not invested in eating animals, they are more likely to be willing to learn the details of what happens to them. That learning will encourage compassionate people to stick with a plant-based diet.

Animal rights is a serious subject, but I do my best to find humor where I can, and I have some great help: there are almost two hundred cartoons included in the book, including dozens from the brilliant Bizarro strip.

Seriously, many people have told me they can't eat turkeys anymore after getting to know them. I think in the wider world, when the stories air on the media, they help banish the idea that birds, other than parrots, are somehow lesser.

Come for the body, stay for the soul.

Once people learn, it is hard to forget and go back.

When I see vegan food sold in single-use plastic containers, I get frustrated knowing that plastic is not really recycled; it is down-cycled to less and less reusable grades, and too much of it eventually ends up in the ocean - where it kills animals. Caring for animals means caring for the environment they live in, and vice versa.

Some of us seem to be born with a drive to try to make the world kinder.