Is this the world's smallest dog? A dachshund mix named Beyonce could fit into a spoon when she was born in March. But she faces some competition. Meysi, a terrier pup from Poland, was so small when she was born that her owner had to feed the pooch with a syringe for six weeks. The tiny canines could be in line to dethrone Boo Boo, a female Chihuahua owned by Lana Elswick of Raceland, Ky. Boo Boo is currently recognized by Guinness World Records as the smallest living dog.