[nicoburns]

I’m not so sure its clear that there’s a spectrum of consciousness. We have no way to observe consciousness (other than our own). For all we know, ants (or even trees or rocks) might well be just as conscious as us. We don’t have any evidence that they are, but that’s largely true of mammals and even other humans too.

[ajuc]

It's the same for other people and other animals, if you care about other people you should care about other mammals at least a little bit.