X spotted a lone deer wandering through our yard and called out, "Doggie!"
Me: Lu (Chinese for "deer")
X: Doggie
After some back and forth, and finally getting him to start calling it a "lu", he suddenly called out, "Donkey!"
Me: Lu
X: Donkey
After we reestablished that it was a "lu", X said, "Horse!"
Me: Lu
X: Doggie
