Neglecting or abusing animals is wrong. When a very mentally abnormal human being can be a person, an animal can as well. We don't know if animals are persons therefore it is wrong to be cruel to them for they might be.
The human's life comes first when an animal attacks her to kill for we are more sure that humans have a right to life than we are animals and even if animals are known to be persons, the human being can live the longest so the animal has to be regrettably sacrificed, if that is the only way, for its life is shorter and far more under threat than our own. We must not prefer animals to humans.
The meat of the more intelligent animals should only be eaten when there is nothing else to eat. The less intelligent animals should only be eaten when it is necessary for the health and life of the supreme animal, humankind. And those who don't know that they are alive should be eaten without any such limitations. But no avoidable suffering should ever be inflicted on an animal.