Since we are animals, as well, I can't quite fit my answer into the options handed to me.
Plain abuse is wrong. Pretty much always. That's what the meaning of the word 'abuse' sort of brings with it as active payload, proper meaning.
That said, I think the abuse of animals 'lower' than us is wrongerererer.
Animals can be assholes, too. It's just that they have less brainpower to put into being assholes. If a cat scratches me, it was probably my fault. It's very rare, but it happens. I must have forced my will onto a cat, grabbed it in a way it didn't know and/or didn't like. If an asshole dog were to attack my - proper trained - dog, I would intervene. Always. Because I love my dog and I can handle physical pain with less emotional and psychological trauma than the rather emotional and easily impressionable 1-120 pounds of comparably stupid dog meat.
If a dog I don't know decides to bite me, it has trespassed, but since I choose to interfere, I have trespassed, as well. I punch, I slap, I bite the throat. Not so much to damage, but to get my point across, with no discussion or leeway. If a dog I don't know gets to my dog, I might have misjudged the situation, but the owner of that other dog made a mistake or two, as well. We humans can talk over biscuits and a nice cup of tea. That's not how animals handle things.
If a jealous parrot peels the meat off my finger bones, my bad. I knew I should have taken her more seriously. I didn't, so she went berserk. It's an asshole parrot with issues, but it was my decision to handle her. I'll slap her and I'll share my thoughts with her, but five minutes later I will go back to that very same parrot and try again. To get a more positive experience out of it for the both of us, and anyone else witnessing the carnage.
If a snake bites me or a scorpion stings me, it's highly probable that it was my fault. I am able to assess situations, make sense of the signals the animal in question sends out in its limited ways and I can decide to come back another day. The average animal does not have this choice, or even the raw processing power to ponder much over notions like this.
I am pro vivisection and pro animal testing, as long as we don't have alternatives. I love animals, so I'm also bound to love humans. Anything else would be very half-assed. However, animals have less choice, and what we perceive as cruelty coming from animals is not something they spend much thought on. They don't plan to be assholes. If we're out in the wild, we meet proud, strong and impressive beasts that would and could kill us without flinching, if we so much as gave them the opportunity. It's why we came up with weapons. Most animals come with all the weapons they need to defend themselves within the realm of nature. We don't have that. Maybe we used to have some of it. We don't anymore. So, we more than make up with brain power. However, not all of us make good use of that brain power. So - I find it far easier to consider a human I don't know to be an utter asshole I don't feel like going out of my way for. Animals, however, are not proper part of our unnatural ways. Some of them have 'chosen' to hang around with us. Most of those co-habit and co-exist in the cracks, inside our walls, on the other side of the painted structures we consider to make up proper habitat, not ever spending much though on the hollow portions of that thing we call 'home'.
From my very own ethic and moral vantage point, cruelty towards animals is the bigger sin, the lower deed, the less justifiable violence.
I could hand you several pages worth of reasons why misanthropy and the total and utter annihiliation of mankind would make proper sense. I could come up with, what, three lines at the very most of why we should wipe out any animal, and be it just friggin' ticks or midges.
We must preserve, for only we wield the power to annihilate everything.
Oh, and I absolutely despise PETA and I don't like WWF or Greenpeace much. I believe certain individuals amongst their ranks actually believe in what they do, and they do it properly. The rest - is the usual misguided asshole army bunch. But that's how we roll, isn't it.
No matter what any one of us manages to create, there's at least a thousand willing to piss all over it and tear it down.
It's what and how we really are.
Homo homini lupus.
I think we're a most fascinating bunch. I just wish we could breed out the asshole genes.
Captcha: until tomorrow