[2ndhandgal]

You need to understand why he is doing it to start with, if he is scared you need to work slowly and carefully to help him overcome his worries - that does not mean just giving people treats to give him. Get a good reward based trainer to come round and have a look at what is happening and give you some advice.

 

[2ndhandgal]

OK - you did not include that you knew he was scared in your first post and some pups will bark from excitement rather than fear so may have been clear to you but was not to me!

Getting people to give dogs treats puts lots of pressure on the dog to take the treat. It is far better to get the people to totally ignore the pup (including not looking at them) and the owner rewarding them for staying calm and at whatever distance they are comfortable at. As they get more comfortable they can start to get closer and investigate the person a little which again is best if the person is totally passive and ignores them. Many people are far too full on for a worried pup so you need calm folk who can let him work it out for himself. As I said before a good reward based trainer can really help you with this.

 

[2ndhandgal]

Rattle cans and similar are not something I would use for any dog but with a nervous dog they can make the whole situation an awful lot worse. Dog will still be worried but no longer telling you which increases your chances of a bite