Duck Dynasty vet Sadie Robertson and her husband Christian Huff are expecting their second child.The couple - who already have one-year-old daughter Honey - took to social media on Friday morning to share the happy news with their fans.'Another little miracle is in motion,' she said over a family photo where the parents and little Honey wore pale colors while sitting on the steps of a house. Sadie was holding a row of black-and-white ultrasound photos as she beamed with pride. Great news! Duck Dynasty vet Sadie Robertson and her husband Christian Huff are expecting their second child.