kant's contradicting points

I disagree with Kant when he says that animals aren’t self conscious and have no direct duties or a sense of purpose. To me, it seems that purpose and self consciousness are two things that aren’t related and may perhaps contradict one another. So how can one tell that an animal doesn’t have a sense of purpose, perhaps a dog feels a strong sense of purpose for the rest of his life to give back to his owner who saved him as a puppy.
One could also say that purpose isn’t something tangible, so it is an illusion of the mind and in reality, we have no more purpose than a dog or a monkey. Animals reactions to take care of their young and collect food seasonally are instinctual. A sense of purpose in humans can be made up by the mind as where instinct is very deeply rooted into animals biologically. Humans have shed much more of their instincts that animals have. So perhaps animals have more direct duties or purpose that humans do.
This sense of purpose in instinctual making it more unconscious and they don’t have to be self aware to follow instinct. which according with Kant, animals don’t possess. However this runs into the conflict that Kant puts emphasis on both self consciousness and sense of purpose and duty where sense of purpose doesn’t correlate with self consciousness.