assalamu alaikum
No, animals are not robots brother. I don't think it's nice to call them "robots". They are a part of the blessings Ar-Rahman gives us as mercy. We eat, we drink, we get clothes from them, they are companions to us, we love them and care for them, they carry us to long distances (camels, horses)... etc. They are created for a purpose in life. But we humans have consciousness! We become good or evil with the choices we make. We are responsible for every action we do or cause. So either we deserve the big reward or the big punishment. But the animals are not responsible for what they do like us. They are not the subjects of this "test".
But of course Allah (swt) knows best. Everything belongs to Him. So He decides what to do with them and He is never unjust. He is Al-Hakim, He gives the best decision and He is the most merciful.