I ask those questions, now that we are raising a new pup.
Does he react more to FedEx et al because they stop at your place regularly, do you think?
You can train him not to bark at the neighbors/their pets, if you are bored, or it's something that you really want to stop. Basically you will make a noise (replacing a click.) and give small treats whenever he is quiet when they are there. That's the super short explanation.
He may be loud, but he's also a good watchdog.
Love All Life, Thank You For Posting! :)