The first thing that I had to do was figure out what was causing such a massive change in
his behavior. Now this can be a very obvious thing for you to determine why your Mastiff became
aggressive, but for some people it can be hard. So you will want to think about what has
changed when this new behavior started happening. I know that for my dog it was easy to
determine what had happened and it was the passing of his mate.
The second thing that you will want to figure out is what you can do to solve this issue.
Now I know that if you are like me your dog will already be through an obedience training
program which is a great solution. If they haven't you will want to have them in an obedience
class. Now if you have already had your Mastiff through an obedience course you will want to
refer back to your class notes and training to get them out of the bad habits they have
now.
While many people that have a Mastiff might go through a wide variety of phases in life an
aggression issue is one that they have to deal with quickly. I know that obedience training and
figuring out what caused this massive change helped me out with my dogs issue.