Here are some links to some exceptionally moving and informative online audio lectures on vegetarianism & animal ethics from a Christian perspective. They are by Matt Halteman, an excellent philosopher from Calvin College. I bet all your readers—religious and secular—would learn a lot from these talks and be inspired. If you would inform them of this resource, that'd be great.
MP3: "Animal Rights & Christian Responsibility"Thanks,
MP3: "Living Toward the Peaceable Kingdom"
Notes: "Compassionate Eating as Care of Creation"
Notes: "Animal Rights and Christian Responsibility"