English Cocker Spaniel
Most experts agree that English Cocker Spaniels are not suited for guard dog duties, as they are typically not aggressive enough. This is largely due to their loyal and friendly nature towards humans, which makes them better suited for companionship and other non-threatening roles.
Newfoundland
If you’re familiar with Peter Pan, you may already know that Newfoundland dogs are often referred to as “nanny dogs”. Dogtime.com further explains that they thrive on spending time with their families and require plenty of exercise and training to satisfy their intelligence and curiosity.