Animals have souls- scriptural. The parts/functions of sould are: Mind, emotion, and will. Animals choose according either of 2 criteria (flight or flight): namely their choices are made as a result of instinct or logic. Man, having a 'free will' is not bound to this and can come up with decisions which are not strictly the result of either influence.
So.. If I understand this correct, you are defining 'free will' as the ability to (or that which grants us the ability to) make decisions unbound by the influence of logic (rationality/reason) or instinct (fight/flight responce). Am I correct in my understanding?