My older sister and her husband had a rottweiler, it was a very nice dog if you were nice to them/part of the family, but it was 205lbs and even when it played you knew not to let it get too worked up. I was riding my bike past it one time it grabbed the tire (it was playing but still) and shook the bike so hard I fell off, completely bent the rim, its the same as throwing a tennis ball to a normal dog, cept if you throw a tennis ball to a 200lb rottweiler it eats it and craps it out later. Get the rottweiler man, I mean assuming you don't have any kids get the rottweiler even if someone breaks in and shoots it, it will still kill them.