A moo'd specialist.
They're the ones who look at YOUR shoes when they talk to you.
Ask about his routine.
Because he higher and higher. (I translated the joke from Dutch, and yeah it's supposed to not make any sense, it just sounds funny, in Dutch at least. :-$)
Heifer-weizen.
ME-OW! I am very sorry. Just thought of it and felt like everyone should hear it. Maybe some jokes are better left untold...
He was delighted.