How interesting. I am not a dog lover (they frighten me and I think they sense it when I'm near them..it stems from an incident in my childhood) but the sixth sense of lots of different animals fascinates me. Things like animals taking to the hills hours before the boxing day Tsunami hit.......those sort of things.
As for hypos, well I've had quite a few of those. Up until I cut down on carbs. I always knew when  readings were too low. The normal things that folk get....shakiness, sweating, confusion..just a general feeling of wobbliness. In recent weeks I've had one or two episodes when I haven't felt as described but when testing,have found my readings in hypo range.
I wouldn't say hypos have a great effect on my daily life, 'cause like most folk probably do, I just deal with them and within a short time I feel right as rain again.I think hubby probably worries more about me going hypo than I do.
Good luck to Nina. I can imagine anyone living on their own with no hypo awareness would be very eager to have a dog to prevent emergencies.