Sure, but capacity for self-awareness? I'd guess that hamsters dream, and that their subconscious processes (eg, desires for food and sleep and sex), and maybe even emotions, run much like ours. It's just that humans, with more complex neural networks, have more layers added on top. It's similar to how the brain-stems of everything from lizards on "up" function similarly, but humans have more-developed pre-frontal cortexes and so forth. (Don't hold me to those details, please, I'm not a neuro-anatomist! You can see where I'm going with that, though, right?)