Neutering or spaying a dog does eventually make them less aggressive, yes, when their body stops producing too much testosterone. Neutered or spayed animals also have a longer life expectancy.
Not necessarily. They will still be aggressive to other animals because of their territory and they may not stop being aggressive.
if you neuter or spay the dog, some dogs are calmer some aren't. It all depends on their temperament
It actually should be less aggressive, but if it is an older dog it will probably remember more than it would if it was young.
A Boxer is the most harmless dog in the world... They rarely bite or get aggressive. The only downfall with them is that they like to sit in everything.
You can make your dog to be aggressive towards other dogs by training them.
No, it is not recommended to make eye contact with an aggressive dog as it can be seen as a challenge or threat, potentially escalating the situation.
Snarling and growling
If you are asking how to make your dog aggressive, it may need to be trained as an attack dog.
Play agressive..
no maybe but always yes
Bad Idea.... If you try to show your dog aggressiveness, it would generally become afraid. Plus, who wants an aggressive dog? Don't try to make a dog aggressive. It will become dog fights and might end up getting it (probably "him") killed.
No. But no meat will make you dog very unhealthy.