There are lots of reasons why dogs are or become aggressive. Maybe the dog feels his territory is being compromised, or he feels threatened.
A lot of aggression comes from lack of confidence and insecurity. Simple obedience will not solve your dog’s aggressive problems only some serious dog training will do the trick.
Aggressiveness doesn’t just mean biting; it means barking and lunging at people as well. This type of behavior needs to be addressed as soon as possible to prevent anything serious from happening to someone or another dog.
Your vet can recommend you how to go about finding someone who can work with aggressive dogs.
Training aggressive dogs is a specialty and unfortunately could cost you a fair amount of money, but the end result is well worth it and you don’t have to worry about losing your dog.