It’s not only Carl Sagan but thousands more

Well Carl Sagan, of course
and thousands of sentient humans
realise that animals feel pain
we don’t need a million quid
spent on research in some laboratory
to tell us this
that stuff is all in vain
anyone who has a pet of any sort
know that it feels pain
of course it does
knows it has emotion
to think some have the notion
that animals are dull
the only pain
is those who think
the animals can’t feel pain
and thus we can just torture
them at will
slit their throats just when
we choose to do that
and start removing bits
before their still