How does Yang's son handle jokes in translation?

Yang's son is nine years old and very clever. Junping Kong thought his father was away, but Hu Er went out. In order to set fruit, there are bayberry. Kong pointed to his son and said, "This is the fruit of your family." The son replied, "I didn't know peacocks were Confucius' poultry." "

Translation:

In Liang, there is a family named Yang. There is a nine-year-old son at home. He is very clever. One day, Junping Kong came to visit his father. It happened that his father was not at home, so Junping Kong called the child out. The child brought Junping Kong fruits, including Yangmei Junping Kong, and said, "This is your fruit." The child immediately replied, "I didn't know Peacock was a gentleman."