I agree in principle -- but only insofar that it is wrong to torture humans and it is also wrong to torture animals. Period. This does not imply that humans and animals are equals. It is sometimes USED to imply that, but in and of itself I would agree that both are equally wrong. Wrong = Wrong. That's logic. I wouldn't say an animal torturer is a better person than a human torturer. I'd say both are scum.
Note that the topic is torture, not killing. I eat meat, hence I can't exactly be against animal killing. I'm against needless suffering. Any sane human being is.