Fangfang said it's not animals, just trees and boats;

Xiaolong said it was on Fangfang's left, and Xiaoming was next to Xiaolong's right.

Explain that there are at least Xiaoming's paintings between Xiaolong and Fangfang's paintings;

I learned that Fangfang can only draw boats.

Xiaogang's painting is separate from Fangfang's, which means Fangfang's painting can only be next to Xiaoming's.

So Xiaoming drew a squirrel.

Xiaolong drew a tree.

Xiaogang drew a chicken.