The Cow Who Clucked is the title of a children's picture book written by American illustrator Denise Fleming.
The narrative revolves around Nelly, a cow who clucks instead of moos after she dreams that she is a mother hen.
She spends the day searching for her missing moo and attempting to replicate it.
When Nelly asks each farm animal if they have seen her moo, the animals response varies such as "maa, maa" and "quack quack".
This article about a children's book is a stub.