I highly recommend the book "Other Minds" by Godfrey-Smith, it has changed my view on this topic. I understood that consciousness is a scale. Humans have "a lot" of it, chimpanzees a bit less, dogs even fewer, but we all have a first person perspective of what it is to be us. I don't know where the scale begins or ends, but I am sure we are not that unique. I assume the capacity for consciousness has plenty to do with hardware and it's capacity for complex operations, so I don't know if all living things (like bacteria, or ants) "have it". Other point: at some moments I feel like I am less conscious, just going through my motions like an automaton, or daydreaming. And then sometimes, while meditating or under very intense stress, I feel hyper conscious. Fascinating topic for sure