Yesterday evening, dogs are sleeping after a walk. Luke gives a startled bark then proceeds to jump up barking and growling looking at all the doors and windows. Zoey jumps up barking, looking at Luke trying to figure out what the heck he is barking at. Neither me or my husband heard anything, we look around. Husband says "What was that all about" My response "I don't know I think he barked and scared himself so started barking more" lol It was so totally random and poor Zoey was so confused.
One time Killian and I were sleeping in my room, and Perkins was sleeping in the livingroom. Killian started barking like crazy and it scared me out of sleep, and everyone knows that adrenaline rush. Turns out he was barking because the fish tank heater had clicked on.