Personalized Happy Birthday with Dog and Mouse Women's V-Neck T-Shirt. Dog and Mouse are excited to wish you the happiest of birthdays! Happy Birthday with Dog and Mouse Women's V-Neck T-Shirt - Kelly Green, perfect for those who love this friendly duo from "Dog and Mouse" by Michelle Nelson-Schmidt. 5.0 oz., 100% pre-shrunk cotton Athletic Heather is 90/10 cotton/polyester 1x1 rib collar with mitered v-neck Shoulder-to-shoulder taping Ladies' fit