Image by static416 via Flickr There are quite a few reasons for dog aggression but firstly you have to understand that aggression for a dog is just a natural instinct which helped them survive in the wild. With a dog like Fig, who was a stray before he was at the shelter, these instincts come to the fore to enable them to survive and you have to work hard to get them to return to the place that we want these instincts to be (at the back of your dogs mind). The same can be said for ...