Last night I was awoken by a strange three-toned beeping sound. It wasn't the alarm clock...it wasn't the C02 detector...it wasn't the smoke alarm. At first I thought I was dreaming. As the sound was only periodic. After a few times when the noise would make its presence known, Marshall would do three non-obnoxious barks in response. I lay their listening trying to figure it out. It went again, Marshall barked again. I got up in the dark trying to figure out where it was coming from. I guess I had turned on my cell phone several days ago. The noise was the cell phone giving off a battery spent warning. I got up, put it on a charger and everyone went back to sleep without hesitation. (Except the golden retriever who never woke up in the first place.)
It was interesting to note how Marshall alerted to something very strange going on. But his barks weren't his "pay attention to me" barks, but a calm sound noting that something different was happening that needed attention.