5. Not setting limitations
Like you need to teach your children what is right and wrong; what the things they are not supposed to do, etc. It is just the same with your Shih Tzu. You need to set some limitations like not to bark unnecessarily, not to pee or poop inside the house and certainly not to bite!
6. Not socializing properly
They love attention and greeting people. So, it is important to make them socialize with other humans and dogs. One more thing that comes to socializing – they will get closer to you.