Mass. Gen. Laws ch. 272, § 80B: Exhibiting dogs with ears cropped or cut off

Section 80B. Whoever shows or exhibits or procures to be shown or exhibited at any dog show or exhibition in the commonwealth a dog with an ear or ears cropped or cut off, except when and as certified to be reasonably necessary by a veterinarian duly registered under the laws of the state of his residence, shall be punished by a fine of not more than two hundred and fifty dollars.