Here is a question for all you trainers in a class environment. How do you go about stopping a puppy from barking with all the other puppies. One to one is not an option.

Give them something to do - a ragger, chew or Kong

Also make sure there is no "eyeballing" so turn pups away from each other if they get a bit barky towards an individual...

Lindsay
X

Dogs that bark are removed for 30 seconds and then they return; it works quite well provided that the owners handle it correctly.