I was having a discussion with my friend about protection work and dogs. My friend basically believes that the big the better for protection. Granted he isn't the most knowledgeable person on dogs but it got me thinking. If you're thinking about protection from a dog you want an athlete right? You don't want a 250lb Mastiff. I mean it would be a huge deterrent but not a real threat to a serious attack. I would guess 90-100 lbs would be ideal maybe bigger if they are just home guardians and don't need to run much. I also realize that breed plays a huge roll. But I have seen 140lb Rotties that don't seem very athletic. I suppose their are dogs like the Boerboel that might be athletic at that weight but on average don't you think smaller dogs would be more effective? What do you guys think?