Damn right. My two Newfies (Newfoundland) are aging but still spry. They are most definitely our children, especially since the daughter moved to New York to take a corporate high muckety-muck job in the elite fashion industry. Those pups are our kids and I'd react to any attack on them as an attack on me. Especially on our property.
Newfies are beautiful dogs. Excellent family pets from what I’ve heard as they are very loyal to their “pack”.