It's really not rocket science. If animals are not mere things; if they have moral value, we cannot justify eating, wearing, or using them particularly when we have no better reason than palate pleasure or fashion. If you are eating, wearing, or using animals, then your actions say that you regard them as mere things, despite what your words say.

It costs us so little to go vegan. It costs animals so much if we don't.

We cannot talk simultaneously about animal rights and the 'humane' slaughter of animals.

If you love animals but think that veganism is extreme, then you are confused about the meaning of love.

If an animal has any rights at all, it's got the right not to be eaten.

We do not think clearly about our moral obligations to animals.

Vegetarianism as a moral position is no more coherent than saying that you think it morally wrong to eat meat from a spotted cow but not morally wrong to eat meat from a non-spotted cow.