Black And White Shih Tzus may be popular but they are quite rare. Some genetic patterns of black and white fur distribution are more common than others. However, the black and white two-tone pairing is relatively rare in general compared to other Shih Tzu coat colors.
The black and white coat color combination in Shih Tzus can be as a result of one of two different genetic profiles. Here are some of the possible patterns and the genes responsible.
Irish Mark Piebald
These Black And White Shih Tzus have a predominantly black coat with white markings covering less than 50% of the coat. The white coat is usually restricted to the chest, shoulders, forehead, and the tips of the paws and tail.
This distribution is as a result of the spotting gene on the S-locus. Interestingly, the white markings on these Black And White Shih Tzus can extend and cover more space as the dog grows older.
These Black And White Shih Tzus have a mainly white coat with black patches usually on the ears, around the eyes, and on the back. This particular pattern is as a result of the piebald gene which is also implicated in hearing issues including full deafness.
Parti-piebald Black And White Shih Tzus are probably the rarest of the black and white variety. They have a coat with an almost equal distribution of black and white fur.
For the most part, the distribution of this fur is very similar to the Irish Mark Piebald with the black fur mainly on the back and tail and the white fur on the chest, belly, face, and paws.
How Big Do Black And White Shih Tzus Get?
The Black And White Shih Tzu is a small-sized dog, similar to all other Shih Tzus. It normally grows to a height of about 8 to 11 inches from paw to shoulder.
A Black And White Shih Tzu also weighs typically between 9 to 16 lbs. It will reach its adult size by the time they mature at 10 months old.