The Top Three Most Aggressive Dog Breeds- You’ll Be Surprised!

[Dustlawyer]

115. I think we agree that bigger dogs cause more damage, which should always be a concern.

Having said that, my experience is that dogs are more dangerous and aggressive when they are afraid. Smaller dogs have more to fear than a larger dog generally speaking. I have been dog sitting a friend's 175 lb Rottweiler, Jessie. He is not trained and has been in the country, away from other dogs his whole life. He is friendly to most people, but has instant dislike of some few. That is the scary part, so he is not meeting anyone new at my house.
The other observation is that all other dogs Jessie meets (all smaller than Jessie), instantly bare their teeth, growl and bark. They are all afraid of him. Dogs I know well that have never been aggressive to other dogs all reacted this way around Jessie. (These meetings occurred either through my fence, or one of the dogs was in a kennel). Smaller dogs are more likely to be afraid of a big strange human than a large dog who is not afraid of you. But I will say this about Jessie, whatever it is that sets him off on some people, it is not fear!