I am not quite sure what you mean by consciousness here. And I am not quite sure how Dasein is involved, either with animals or with your story.
It could have been a minor fugue state:
en.wikipedia.org/wiki/Fugue_state
It could have been Transient Global Amnesia…
mayoclinic.org/diseases-con … c-20378531
Though really, these are descriptive, not really giving you an understanding.
I think we are much more complicated than most people notice or want to notice. Could have been physiological anomalies that led you to be not really present in that time. Could have been that you had a traumatic dream, which you did not remember, and this threw you into all sorts of defense mechanisms and a kind of reduction of consciousness, a bit like freezing when a predator is leaning over you and you cannot run or fight: the third reaction ‘freezing’ but one that was not complete, so you were able to move, but you were not really ‘there’. I have experienced that and relate it to childhood trauma getting retriggered.
I was once walking about a little town, encountered an acquaintance and felt really quite unreal. I felt distant in myself. A bit like how alcohol can make things feel distant but I was sober.
somewhere between Derealization…
en.wikipedia.org/wiki/Derealization
and Depersonalization
en.wikipedia.org/wiki/Depersonalization
I think most people have so many defenses that these states are harder for them to experience. They are not introspective as a rule, and so the boundary between the unconscious and the conscious is much more closed to them. So no storms come sweeping out the unconscious to affect the way they experience things. They are no doubt affected by storms from the unconscious - and are in a bad mood for ‘no reason’, but the phenomenology of their experiencing is pretty much the same. But if the boundary between the consciousn and unconscious is more open and in fact one is conscious of one’s unconscious - from therapy, spirituality, meditation, shamanism, traumatic experiences, curiosity, creative work, whatever - many more states of consciousness are possible, both pleasant and unpleasant.