There was just a loud knock on my front door. Nitro went crazy! He tore the house down barking, he’s never done that, normally he’d give one bark if he got a fright, but this time he barked about 5 times. I thought it was my sister, she’s coming over in a little while. I walked to the door and asked if it was my sister. There was no answer. The person walked away as soon as they heard Nitro’s loud bark, I heard them go out the gate and shut the gate after them. Thank you Nitro! Thanks for keeping me safe! I love my boy! He’s a real trooper!