Coo Sisters is a heartwarming, gently humorous children's picture book based on the real animals and real adventures of Hays Manor, a small Texas farm filled with love, laughter, and shaggy Highland cows. In this sixth story of the Highland Coo series, young readers follow Alana Faye-a fluffy, spirited yearling Highland heifer-whose world changes the moment her mother, Millie, welcomes a brand-new baby calf named Fiona Mae. At first, Alana Faye isn't sure she likes this tiny newcomer. Fiona gets all the special treatment, the cozy barn stall, and the cuddles Alana still wishes were hers. Through soft watercolor scenes and warm, lyrical storytelling, Coo Sisters follows Alana's journey from jealousy and confusion to pride and sisterly love. With the help of patient humans, a watchful momma cow, the family horse Willow, and the gentle rhythms of farm life, Alana discovers that being a big sister means more than sharing-it means guiding, protecting, and loving with her whole heart. Young readers will delight in seeing Fiona try to mimic everything Alana does, from splashing through puddles to scratching on fence posts, and they'll laugh when the curious calf tries to nurse from the wrong coo. Through each tender and comical moment, the bond between the two sisters grows stronger. Filled with real farm details, true-to-life animal behavior, and soothing, nostalgic artwork, Coo Sisters is a story about change, family, and the beautiful ways love grows. Perfect for bedtime, classroom reading, or any child who adores animals, this book gently teaches empathy, responsibility, and the joy of welcoming someone new. A cozy, heartfelt celebration of sisterhood-Highland style.