All livestock, poultry, waterfowl and animals, including cats, dogs and other pets imported into Massachusetts by any person, firm, corporation, except for the purpose of immediate slaughter, shall be accompanied by an official health certificate stating that the animals are healthy, free of symptoms of infectious or transmissible disease , internal and/or external parasites and exposure to any infectious, contagious disease.

Certificates of health are valid for 30 days provided the animal remains healthy. All animals transported into Massachusetts for slaughter must be accompanied by USDA approved waybills and identified by eartags, backtags or other USDA approved identification.