I've been trying a new tactic for barking. My dogs don't bark a LOT, really, as it is so quiet around here. But because it is so quiet, if the tv or music isn't on, you hear everything. A deer snorted in the driveway and I swear I thought it was in the kitchen LOL.
So when the dogs bark, I am suppressing my desire to yell SHUT UUUUUUUUUUUPPPPPPPPPP! (which never works anyway) and have tried whispering instead. seriously. Or just very quietly saying...ok, I got it , guys, I hear you, it's all good. Then get softer and softer. It seems to work! at least work faster than joining in, so to speak.