I'm sure you mean well and your passion for dogs maybe causes you to "harsh" however I know myself and I know that I'm a resposible pet owner even if by your standards I may not be.
Cymbaline
Hi Cymbaline,
I know that you love your dogs, you wouldn't be here asking for help and advice if you didn't. However, if they live outside, get only 30 - 45 minutes with you a day, and are escaping because they are bored and don't get enough excersize and stimulation, and you can't give them the time and excersize that they need - then the responsible thing to do is to contact some rescue organizations and see if you can find new homes for them where they will get the excersize, socialization, training and human contact that they need. Many rescues have referral programs - this means that the dogs stay with you instead of being taken into foster care by the rescue. The rescue lists the dogs on their web sites and invites you to bring the dogs to adoptions where they may be a good fit.
If you really can't give them the time and excersize that they need and socialize and train them, then finding them a home where they will get these things is the kindest, most responsible thing that you can do for them.
As someone already stated, your dogs chasing the kid on the bike and killing the rabbit do not in any way indicate that they have aggressive tendencies. It's normal behavior for breeds with a high prey drive. That's why Huskies and Malamutes need obedience training starting at a young age. They need to be trained not to chase people and other animals while on leash. When they are off leash, it's up to their owners to make sure they are safely contained.
Your dog growling when the kid got in his face - he was NOT being aggresive. He was using normal "dog language" and letting the kid know that he did not like the kid being in his face. The kid needs to be taught that he needs to ask before petting a dog, and that it's not a good idea just to get in a dog's face like that. And now that you know your dog doesn't like kids getting up in his face, you need to tell kids that it's better if they keep their distance. You need to know your dog and be his advocate.
As far as attacking the other Malamute, from what I've read about Malamute males, this is pretty standard behavior. I too was surprised to read that you have two male Malamutes and that they are not aggressive towards each other.
This is from the Alaskan Malamute Club of America's site:
"Alaskan Malamutes were originally bred to haul heavy sleds across long distances in harsh winter conditions. This necessitated a dog that had tremendous strength, energy, endurance, independence and intelligence. These traits still define Alaskan Malamutes. A first time Mal owner soon learns what this really means. These dogs have extremely high energy levels which require release in appropriate ways. They need to run, play, and bounce around a lot. Without continuous physical and mental stimulation, they become bored and restless. This will certainly result in destructive activities of the dog's choosing, not yours. Alaskan Malamutes can be quite boisterous and even rowdy, especially during their growing years. They will try to challenge the family for the top or "alpha" role. With a large dog (they grow to 65lbs-85lbs and up) this cannot be allowed to happen. The family must learn how to properly deal with this for everyone's sake. "
The same is true of Siberian Huskies, which is why so many shelters have more Huskies than other breeds, and why Husky rescues are continually full.
Best of luck to you. If you can't give your dogs the life that they need, then helping to find them the right kind of home is the best thing that you can do for them.