Only humans have inherent value because they possess some special property like intelligence, or autonomy, or reason. Only humans have inherent value because they belong to the human species. This is simply speciesism. Only humans have inherent value because animals don't have immortal souls. The existence of an immortal soul is too controversial an issue to rest an ethical position on.
Animals have some intrinsic value, but less than humans.
Any basis for a difference will also rule out intrinsic value for some humans. It is wrong to use animals in science or in commercial agriculture. It is wrong to hunt commercially or for sport. Philosophy is no substitute for action. Everything with inherent value has rights which must be respect by other beings.