Mack is showing signs of aggression....

[MacsMommy]

You need training class.

Immediately. If this dog is not neutered, he would be going in for that the first available appointment, and I'm talking next week.

Being on the bed, nope nope nope nope. Allowing your dog up on the bed with you puts him on an equal status with you. He is already treating you as a subordinant.

This article has very good hands on easy to implement instructions on how to assume the leadership role, and how to present a leadership figure to your dog.

It will involve changing a lot of things in this dogs life, and also yours. These dogs can be turned around, but it takes dedication and resolve on the part of the owners.

http://www.sonic.net/~cdlcruz/GPCC/library/alpha.htm

Can you tell me how old this dog is, if he is indeed neutered, where he sleeps, if you feed him on a schedule or not, and if he guards things from you such as toys or food?

What training has he had?

What breed is he? Looked to be a boxer, but I could not really tell?

HOw old was this dog when you got him, or when was he removed from his litter, if you know?

He is a Boxer /Mastiff and he was 1 1/2 when we got him .

[MacsMommy]

We are taking him out for a run three times a day instead of just two, also we are making him do things more often, like sit and lay, when I walk him on his leash if he pulls me I make him sit down, wait a few mins and they tell him ok.

He is such a smart dog, very quick to learn.
We recently learned that he knows a game with his treats, we rub a treat on both hands then put the treat in one hand behind our back, then we put our hands out closed fist around the treat and make him pick which one it is in, he puts his paw on the hand it is in ans we give it to him, he is very gentle about it as well. Very smart dog, we are all very glad to have him in our family !

[butrrfly23]

Just a couple more pieces of advice...on your walks/runs, make sure that you (and your BF) exit the door first and even ask him to sit and stay just inside the door until you give him permission to come out. Then, make him sit and wait while you close the door and keep him in a heel the entire time (can be easily learned in Obedience class along with proper leash corrections to keep him on task). Never allow him to move out ahead of you as that puts him in the leadership role.

My husband and I also do not allow our dogs to be within several feet of us while we're eating and they must go and lay down quietly while we eat. We eat first, then we feed them. Again, just reinforces the pack hierarchy and give the dogs a clear structure for who's in control.

By the way, dogs WANT to be led by you. In nature, if dogs don't percieve a strong dominant alpha in their pack, they will step up to be that leader because their instinct tells them the pack needs someone to lead. And it's much better for the human (who has the power of reason to make good decisions) to make all the decisions for the dog on what is proper behavior.

Good luck!