Personalized Dog and Mouse Best Friends Youth T-Shirt. Friends are always there for you - rain or shine. Dog and Mouse Best Friends Youth T-Shirt - Azalea features two scenes of this budding friendship from "Dog and Mouse" by Michelle Nelson-Schmidt. Let the good times roll in a durable T-Shirt that takes kids from school to play in an amazing array of colors. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar.