I have a male 3-month-old Shih Tzu and Pekingese mix who has only barked once. I am scared that this is not normal for a puppy this old. I have looked it up and I found an answer for a Collie so it might be different per breeds. I just want to know because maybe a Collie is different than a Shih Tzu and Pekingese mix. I would just like to know if it is normal that he has yet to really bark and about when he might or should be barking. Thank You!