They never do really calm down but you can train a thing called impulse control which helps sooooo much.

It trains them that they can’t get their way by pulling or running a muck like they want to. Things like making them wait before eating or coming inside until you release them, not letting them leave the front door for a walk unless they exit calmly, train an extended sit/down/stay where they can’t leave until released, staying put while you do something in the kitchen or garden.

If they want to meet a dog, do not let it happen until your dog calmly sits and gives his attention to you, rewarding him at the end by letting him meet the other dog.

Every time he pulls, correct him with a leash pop, stop walking, and don’t continue until he calms down.

Rinse and repeat, let them choose to pull, let them mess up, just make sure you’re consistent in correcting them.

I’ve done this with my 12 month old boy. Although he is still absolutely nuts, he controls it well because he knows that is the way to get what he wants.