We got Tatum when she was 12 weeks old and I didn't even think that she COULD bark. It was actually months before I ever heard her bark. She is almost a year and 1/2 old now and she still hardly EVER barks...only when something really startles her. Her bark is very tiny and her little voice sounds raspy...lol, it's just the cutest thing. She definitely isn't a barker though. All she does is whine whine whine and cry cry cry...like a baby puppy would do. In fact, she still sounds exactly like she did at 12 weeks when we brought her home
Now my other Yorkie (he is a male) is MY BARKER

As my hubby always says, he is very vocal

LOL