re: Can you train aggressiveness out of dogs?

My golden doodle shows his teeth and growls if another dog tries to eat out his bowl while he’s eating his food.

I honestly don’t blame him.

I have commands that let him know it’s time to eat and if he’s not eating, he won’t care if another dog goes for his bowl. Shows no other aggressions in any other scenarios unless a dog won’t stop trying to hump him at the dog park, which again I don’t blame him for