Animals act and react solely on instinct, there is no love, meditation, sense of morality or spiritual inclinations in any of them.
You just described the vast majority of humans. Most humans are quite self-unaware and act out of nothing but their impulses without genuine love, and absolute lack of meditation, minimal morality, or outright zero spiritual inclinations. You've read your Bible haven't you? "Many are called but few are chosen"? Yet you assume all humans are Enlightened children of the Divine?
But regarding animals, again, this is not true of higher order species at all. You find generosity in them as well as greed and selfishness, the same as us. You certainly do see love. Do you think your dog doesn't feel a connecting bond with you, but rather is just some ravenous feeding beast that could care less if you were there or not, so long as it had food? I mean that alone should make you question your views.
They all kill indiscriminately, they eat other animals alive, they do not protest injustices, nor establish a moral code.
Again, you just described the human species. Look at our industrial meat production facilities where animals are slaughtered every day as if there are nothing at all in order to satisfy our desires for meat products from McDonalds and giant slabs of meat as the main feature of our dinners, when we could eat less meat with every meal and more vegetables instead.
Look at us humans who not not protest social injustices and turn a blind eye to the suffering of others. Look at those who disregard the rights and feelings of others as they ram their system of beliefs down other people's throats. And so forth. You just described humans.
And besides, no actually. Animals do not kill indiscriminately. Nor do they eat animals alive. They kill them first. It's hard to eat something that is kicking you in the face!
Plus, they kill only what they need to survive. It's humans who indiscriminately kill in acts of war, bombing cities and killing non-combatants, for instance.
They cannot treat other species as themselves while they're feeding on the other's children, obviously.
And humans don't slaughter pigs, and chickens, and cows, and deer, and fish, and......?
What is this image of humans you have that sees them as not the same as the animals you are describing? Everything you put them down for, is precisely the same thing we do. Yet, you probably don't consider humans to be animals themselves, do you?
They are only loyal to those who feed and protect them, and they prostitute themselves to the most generous donor.
Again, you are describing humans to a T.
They eat, sleep, defecate, and procreate - you will never catch one contemplating God or their existence, that's utterly absurd - there's nothing within their behaviour to substantiate that. All the analysis that say otherwise, are misinterpreted.
Again, most humans fit this description as well. But, how do you actually know whether or a not a dolphin, or an elephant, or a whale, or a rabbit even, doesn't feel a connection with God? How do you know that?
I would argue actually they probably have more connection that most humans, because they don't have as many complex distractions and ideas about things cluttering their heads like humans do. It may be simplistic, and unformed, but then again, 'Except you become as a little child, you cannot see God'. Maybe they aren't the ones who are so lost as we are?