had a chance.

Some, like horses and deer, were not bold enough; or were
stupid, like buffaloes.

Some had over-trustful characters, like the seals; or exploitable
characters, like cows, and chickens, and sheep. Such creatures
sentence themselves to be captives, by their lack of ambition.

Dogs? They have more spirit. But they have lost their chance
of kingship through worshipping us. The dog's finer qualities
can't be praised too warmly; there is a purity about his devotion
which makes mere men feel speechless: but with all love for
dogs, one must grant they are vassals, not rulers. They are too
parasitic--the one willing servant class of the world. And we have
betrayed them by making under-simians of them. We have taught them
some of our own ways of behaving, and frowned upon theirs. Loving
us, they let us stop their developing in tune with their natures;
and they've patiently tried ever since to adopt ways of ours. They
have done it, too; but of course they can't get far: it's not their
own road. Dogs have more love than integrity. They've been true
to us, yes, but they haven't been true to themselves.

Pigs? The pig is remarkably intelligent and brave,--but he's
gross; and grossness delays one's achievement, it takes so much
time. The snake too, though wise, has a way of eating himself into
stupors. If super-snake-men had had banquets they would have been
too vast to describe. Each little snake family could have eaten a
herd of cattle at Christmas.