Aw, I'm sorry Bacardi got so frightened and confused and then took it out on you.
In my opinion, it was a combination of having been shut in the room, the dark, not recognizing you and the dogs kind of making Bacardi feel "trapped". I think it was a fear reaction.

I have to say, it also could be senility setting in. So ask your vet about it. There are meds to help but you have to start them before symptoms become acute. When our Jack Russell got up to about age 16 1/2, she started showing signs of senility. It got worse between 16 1/2 and her 17th birthday. She had day & night all mixed up, spent the nights pacing, panting, whining and barking. I sat up with her many nights while my husband tried to wrap his mind around the fact she was failing....In my attempts to comfort her in her confused state, she snapped and nipped me several times. It was a very difficult 6 months of so. We didn't know about the meds that could've been tried and didn't really recognize the initial symptoms as senility setting in, so by time we tried the meds, they didn't help any.