Sometimes Peas are not as smart as we would like them to be. I have/had numerous Rottweilers and my Peas will stand their ground and be nose to nose with the dogs. Luckily we train the dogs from babies to not mess with the birds, otherwise we would have lost many Peas this way. They seem to think they are every bit as big and tough as the dogs.
If something tries to get him in the middle of the night, you may hear nothing, we have gone out in the dark many times to candle eggs under Peahens and even to move birds from one pen to another, seldom do they make much noise other than a nervous clucking you would never hear in the house.