Just wait for the first oh **** moment, the first time it goes off in the middle of night. That's when having a dog really comes in handy. If I don't hear barking or growling, I'm 99% confident that it's a false alarm.
Had 1 experience in the 12 years I had the alarm where the dog was making noise also. It was false due to a storm, but it had an entirely different feeling in my mind.