Mazo de la Roche 
Bill and Coo [EPUB ebook] 

From the author of the bestselling Jalna series, a story of one small thing that creates a lot of beauty.
Bill and Coo were two pigeons who built their nest in the shelter of the gable of the Dullards’ house. Mr. and Mrs. Dullard hated all birds, especially pigeons. Mr. Dullard even tries to hit Bill with a rock, but the rock bounced back from the roof and hit Mr. Dullard instead. After that they let the pigeons alone, but they grumbled about them continually.
When the beautiful new egg Coo laid was hatched, something emerged which changed the lives of the envious, bad-tempered humans living beneath and had a surprising effect on the jealous members of the bird world.
In language of great simplicity and with a storyteller’s art, Mazo de la Roche tells of the little baby bird whose coming spreads beauty where harshness and envy had been before.