Making animal sounds

So I was taking Nathan out of his Carseat yesterday and all of a sudden he says
"cow"
I laughed and said "I don't see any cows, what does a cow say?"
he told me right away
"Moo"
"good boy, your very smart a cow says moo that's right"
"dog"
I guess he was going to tell me all the animals he knew,
"Okay what does a doggie say?"
"moo"
"no a doggie says woof, woof"
he thinks for a second
"so what does a doggie say?"
"moof"


I guess your never to young to learn how to compromise???