Mooooo

My son is really into animals right now. Ducks make a quack quack noise. Cats meow. A pig makes a snorty noise. And everything else goes Mooooo!
My husband and I were walking on the boardwalk with our son in his stroller. There was a couple sitting on one of the benches on the side of the boardwalk, with a very very large dog. Lucas took one look at the dog, pointed at it and said "Mama! Mooooooooo!"