One thing that many dog owners fear is when their dog shows sign of aggression. There are many dog behavior problems that owners deal with but aggression is the one that usually ends up with the dog being surrendered to a shelter.
I would have to say that the majority of dogs are aggressive by nature. Breeders have for years tried to breed the aggression out of our dogs and have had a degree of success. But a dog’s aggression is an instinct that they have had since the beginning of time. It is their survival instinct.
Years ago dogs hunted for food, fought to protect their territory and their mate. They also fought their pack members for their position in the pack. Maintaining the alpha position did not come easy especially as one aged.