Animals are blessings and of the good things provided by Allah for our benefit:
Do they not see that We have created for them from what Our hands have made, grazing livestock, and [then] they are their owners? And We have tamed them for them, so some of them they ride, and some of them they eat. And for them therein are [other] benefits and drinks, so will they not be grateful? (36:71-73)
And indeed, for you in livestock is a lesson. We give you drink from that which is in their bellies, and for you in them are numerous benefits, and from them you eat. And upon them and on ships you are carried. (23:21-22)
It is Allah who made for you the grazing animals upon which you ride, and some of them you eat. And for you therein are [other] benefits and that you may realize upon them a need which is in your breasts; and upon them and upon ships you are carried. And He shows you His signs. So which of the signs of Allah do you deny? (40:79-81)
We must treat them kindly at all times, including slaughter.
Our father Ibrahim alayhissalaam also ate meat and gave it as food to guests, yet he is described by Allah as awwaahun haleem:
And certainly did Our messengers come to Abraham with good tidings; they said, "Peace." He said, "Peace," and did not delay in bringing [them] a roasted calf. (11:69)
Then he went to his family and came with a fat [roasted] calf (51:26)
Awaahun is variously translated as compassionate, soft of heart, tender-hearted.
He is mentioned in the Qur'an as an example: "There has already been for you an excellent pattern in Abraham and those with him..." (60:4, part)
So, if we think we are being kind and good by not eating animals, or that it's morally wrong to eat an animal, then we've actually got it wrong, and are denying ourselves one of the blessings of Allah, because the prophets were examples of moderation and balance and kindness.
hisnameiszzz, we can't treat animals exactly the same way as a human. I think they get over things quicker, forget quicker etc. Allah knows best.