Human Vs Animal
Of course animals have nature/fitrah, and so do humans . Emotions like being happy, sad, angry, etc. is also part of the fitrah. Humans, however, have something additional that’s called nafs by the Quran. Ghamidi sahab explains nafs as personality/shakhsiyat. Some other scholars call it the soul/rooh. The capability to distinguish between right and wrong has been instilled in our fitrah, but it is our nafs that either accepts or rejects the fitrah and compels us to carry out good and bad deeds. That’s what makes our nafs accountable for our deeds. It is the nafs that’s being tested in this world, and will be held accountable in the hereafter. Our bodies are nothing but the mediums that carry out the commands of our nafs. When we die, our worldly bodies shall cease to exist while our nafs shall continue it’s journey. In the next life our nafs will be given brand new bodies and we shall continue to live forever. Since animals do not have the nafs, there’s no question of accountability. I hope that this helps.