Can animals do God’s will?
Animals (like trees and rocks) always (!) do G-d’s will because that’s how they are “programmed”. Only man is unique among all creation in that G-d willed us to have “free will”, to choose between good and bad, to do His will, or not. Rav Kook adds that according to some opinions, in the future ideal world, man may “train” animals to be more moral, for example, perhaps to no longer be carnivorous (but to be vegetarians).