Bears live in competitive environments in Alaska where they have to fight other bears for the best fishing holes (during Salmon run). I don't see a world where any land animal is killing a full grown Kodiak bear that is intent on fighting. Their coat alone is THICK armor and their strength and power is unreal. The toughest animals they fight are other bears. Traditional brown bears are on average smaller than Polar bears, but the brown bears of Kodiak island are just as big as Polar Bears- its much closer.,(reply>), sᴇɴᴅ ᴀ ᴍᴇssᴀɢᴇ👆👆👆.