In the scriptures both human beings and animals are living souls, (Genesis 2:7)
and the scriptures also teach that the spirit that's in human beings is also in animals (Genesis 7:22; Ecclesiastes 3:19-22). So I don't believe that because animals have the same spirit that's in human beings I don't believe animals have consciousness like human beings.The scriptures teach that when it comes to the topic of death human beings are not superior to animals. So just as animals cease to be living animals or living souls when they die, human beings cease to be living souls or living persons when they die. Human beings are superior to the beasts only in one way and that's because God created the human being in God's image, meaning human beings can reflect God's moral qualities(love, justice, mercy, compassion etc) Yet human beings who are living souls or living persons cease to be living souls or living persons when they die, just like animals stop being living souls or living animals when they die.
So when a human being dies he/she no longer is a living person who can recall memories he/she can't remember them, or reflect on them, he/she no longer has any curiosity, or reasoning, or imagination, or .emotions. When a human being dies he/she has no consciousness. That human being that once was a living soul or living person when he/she dies is no longer a living soul or living person.