Personalized Dog and Mouse Building Snowman Newborn Layette. Dog and Mouse work together as best friends to create something wonderful. Dog and Mouse Building Snowman Newborn Layette - Heather, for helpful friends who love "Dog and Mouse" by Michelle Nelson-Schmidt. 100% combed ringspun cotton 5.8 ounce 1×1 baby rib sleeper. 3/8" flatlock binding at envelope neck and cuffs. Back sleeve flap to protect hands. Elastic opening at bottom. Infant: 0-3 Months