Well, my babies bark all the time but since my trainer gave me this coke-can taped at the top with beans/or what ever makes a noise.
And when they bark non stop SHAKE the Can and they run. My UPS man could not even ring the door bell they would bark.
You might try this. I know when they get too loud we just take the can out and now they run and its quiet. You are not hurting them they know you will get the noise out if they don't be quiet.
Let me know
Cheryl