20. Argentina Dogo

Although the Dogo Argentino is an excellent family defender, it should be handled carefully among strangers. The breed can grow to a maximum weight of 100 pounds and reach a height of between 26 and 27 inches from shoulder to ground. This is one of the reasons the Dogo Argentino needs so much training. These large, extraordinarily strong, and intelligent animals are native to Argentina. The Dogo Argentino has a propensity to display their strength when agitated or when they feel that they or their family are in danger. It could manifest as a lunge, a bite, or another kind of aggression.