Solution: Suppose Xiaoling's family used to have X chickens, then Xiaoling's family used to have 3x ducklings, and Xiaoling's family later had (x+2) chickens and (3x+2) ducklings.

The solution of (x+2)*2=3x+2 gives x=2 (only).

Xiaoling's original duckling was 3x=6 (only).

A: Xiaoling's family originally raised two and six ducklings.