Trey kept trying to fall asleep during our evening stroller ride in our pajamas. We were almost home so I made him stay awake. This is the conversation as I'm carrying him up to his room. (He knows where we are going.)
I said "What does a cow say?"
Response: "Nigh-Nigh."
"Trey, what does a dog say?"
Response: "Nigh-Nigh."
"Trey, what does a cat say?"
Response: "Nigh-Nigh."

One track mind. I think he wants to go "nigh-nigh."