Teddy can generally make corresponding actions according to human commands when he is about 8 months old. However, this is not a matter of understanding words, but also conditioned reflex. He often repeats certain commands. Over time, the dog will develop reaction. Teddy is a relatively smart dog with a relatively high IQ and strong learning ability. As long as the owner trains it patiently, the dog will complete the instructions, and over time, the dog will also observe people's facial expressions.