Mass. Gen. Laws ch. 112 § 58B
A veterinarian who, while in the normal course of business, observes an animal whom such veterinarian knows or reasonably suspects has been the victim of animal cruelty prohibited under sections 77 or 94 of chapter 272 shall report said suspected animal cruelty to a police officer or special state police officer appointed under section 57 of chapter 22C.
A veterinarian duly registered under section 55 who reports, in good faith and in the normal course of business, a suspected act of cruelty to animals prohibited under said sections 77 or 94 of chapter 272 to a police officer or special state police officer appointed under said section 57 of said chapter 22C, shall not be liable in a civil or criminal action for reporting such act.
Any veterinarian who fails to report such an act of animal cruelty shall be reported to the board of registration in veterinary medicine.
Mass. Gen. Laws ch. 112, § 58B