The Year at Maple Hill Farm (Year at Maple Hill Farm Tr) by Alice Provensen, Martin Provensen

This is a book about farm animals, and what happens during one year on a farm.
In January, the cows stay in the barnyard, and the chickens don't lay many eggs. By March, you can tell spring is coming: the barn is filled with baby animals. Month by month, the animals at Maple Hill Farm sense the changing seasons and respond to the changes.
Through gently humorous text and charming illustrations, Alice and Martin Provensen capture one year at their beloved Maple Hill Farm in a way sure to delight city slickers and country folk alike.