The cat does not merely experience contentment, he exudes it. You cannot be in the presence of a contented cat and not have some of that contentment … - Jeffrey Masson

Rats and mice are not generally regarded as pets, but as pests; they have few defenders. Yet the pain a rat or a mouse feels is every bit as real as that of any pet. In laboratories, they suffer, as anybody who has heard them moan, cry, whimper and even scream knows. The experimenters dissimulate about this by insisting that they are merely vocalising. Descartes lives on.

I do not find it surprising that the Jains, the Buddhists, and the Hindus have all taken seriously the lives of others. The ability to imagine ourselves into the minds and bodies of “others”—whether humans we term different from us (Down syndrome children; Alzheimer sufferers; the so-called mentally ill) or the animals we use for our food—is of central importance because the failure to do so is precisely what led to the horrors of Auschwitz. So, when people ask, Have you nothing more important to think about? the answer is: There is nothing more important to think about than the heart of empathy, which in the final analysis is nothing other than the ability to love. Becoming a vegan is simply one manifestation of that love.

Cats are contented with their lot, with or without our approval. They have less need of us than we would like. It would flatter us to think that cats cannot survive without us, that they need us emotionally as well as materially, whereas in fact they probably do not need us in either sphere. This wounds our vanity. We need cats to need us. It unnerves us that they do not. However, if they do not need us, they nonetheless seem to love us.