Bake and cool cake. Place on cooling grid positioned over waxed paper. Cover cake with pink cookie icing and let dry overnight.
Position cake on waxed paper covered surface.
Tint fondant dark and light brown. Roll a 1 in. ball of dark brown fondant for head, flatten slightly and attach to cookie. Roll 5/8 in. dark brown fondant circles for ears and 1/4 in. light brown fondant circles for inner ears. Attach with damp brush. Roll 3/4 in. x 1 in. light brown fondant oval for muzzle; attach with damp brush. Roll 2 dark brown fondant logs 1/2 in. wide x 1 1/2 in. long for paws. Flatten one end and cut slits for paws. Roll 2 dark brown fondant ovals 1 in. x 1 1/2 in. for feet. Roll 2 light brown fondant ovals 3/4 in. x 1 in. for pads of feet; attach pieces with damp brush.
Use tip 2 and black royal icing to pipe facial features.
Use tip 2 and red royal icing to make dots and print message.