It is that humans get their problems off their chest by mistreating animals?

It is said that humans are the most developed race, but does this give us the right to mistreat poor animals? It won’t make you most shrewd to take advantage of your power over animals by abusing them. Humans are the embodiment of selfishness, ill-treatment and abuse. Humans do not use to care about others; still less about animals. The question is: Do not you consider enough clever and smart yourself? Or it is that you have to prove it by maltreating other leaving-organisms such as animals?