There is no evidence that there is any form of spirit realm, or any existence outside of the cells of your brain.
Yet, a belief in an afterlife is one of the most commonly held ideas of the human race. We appear to have the need to believe in something like this, but no testing has ever substantiated it.
What about animals? Do they have a soul that continues after death? If humans do, then I don't see why animals would not. The difference between humans and animals is merely a matter of degree.
Colonel Sanders must be responsible for a large part of the population of the afterlife. I'll bet there are clubs devoted to desecrating his memory.