[yorkietalkjilly]

Just allow him the barking you want then tell him "Stop" or "No" or "Enough" or whatever word you want to use. First teach him to bark on command using treats after each time he starts barking, saying "Bark, bark" or "Speak" when he starts barking and then "Good bark/speak" and offer instant treat right after the verbal "Good" verbal mark. Soon you won't need to wait until he's already barking, just say the words and he'll start, you verbally mark that he's doing it and instantly treat. Keep repeating that exercise for short periods for a couple of weeks. Then when he's doing that on command nicely(easiest trick to teach a Yorkie!), say your stop word, make a gesture across your throat as a movie director does in "Cut!" and stand up or something to get his attention as you say it. If he will stop without you standing up, that's fine but do something different to get his attention if he's barking away on command and doesn't stop when you use your stop word. When he does stop barking, say "Good stop" or whatever word you said to stop him and instantly offer a treat. He'll soon learn that barking on command gets him a positive verbal mark and a treat - but so does instantly stopping on command! At first he will learn it simply as a trick but later, he will see it as just something he does because you told him to and if he's barking like crazy at the person on the other side of the front door and momma says "Stop", you stop out of habit and because she said to.