female boxer 2yrs old

Question
I have a boxer and over the last few months she has started attacking on of my male dogs, she does not attack the intact male only the neutered male. (he tends to be the alpha male) she does not show aggression towards people just the other dog, the result is all three dogs get into the fight once the fight is broke up she is quick to submit and knows she is in trouble. I have been told that she could have a reproductive problem or possibly a thyroid problem what do you think?

Answer
Attacking the neutered male has nothing to do with it, compared to the intact male.

The other male that joins in on the fight is either the peace maker trying to stop the aggressor or he protecting the victim being attacked.

Her aggression is of a personal nature toward the neutered male.

If he tends to be the alpha male, she could be challenging him for the dominate position.

Try to become the alpha of your pack of dogs and take their alpha away from them.

At meal time, gather all of them, and take them into the kitchen.

Put their food bowls on the counter or kitchen table and place cookies or crackers on the table behind the bowls.

Stand and eat them one by one while not looking at the dogs as they watch you eat.

When you are finished, place their food bowls down on the floor and tell them it's okay to eat now.

What this does is show and prove you are the alpha because packs in the wild do this. The alpha eats first while the pack waits, and when the alpha is finished, he tells them they can eat the leftovers if there are any.

You will see an improvement within a few weeks if you do this at every meal.

Also, when she is aggressive, put her down on the floor and hold her in the submissive position for a few minutes until she becomes submissive to you. This is what the alpha does and also their mothers when they are still in the litter. She teaches them to submit to her because of unacceptable behavior.