Commonwealth v. Duncan, 7 N.E.3d 469

Police responding to a domestic call at defendant’s home saw dogs in the front yard on January 2 and again on January 8; the yard was enclosed by a six‑foot privacy fence with a padlocked gate.
On January 8, in bleak snowy/freezing weather, a neighbor reported two dead dogs and one emaciated dog; officers observed two motionless dogs leashed to the fence and a third alive but emaciated, with no visible food or water.
Officers could not reach the house because the gate was padlocked; they attempted to rouse occupants, called for registered owner contact, and then summoned the fire department to remove the padlock; animal control took custody of the dogs.
Defendant was charged with three counts of animal cruelty (G. L. c. 272, § 77); she moved to suppress evidence obtained from the warrantless entry and seizure.
The District Court granted the motion to suppress and, noting uncertainty of law, reported the question whether the “pure emergency” (emergency aid) exception to the warrant requirement extends to animals.
The Supreme Judicial Court answered the reported question affirmatively, remanding for further proceedings; the motion judge had not made a factual finding on whether an emergency actually existed.

Issue	Plaintiff's Argument	Defendant's Argument	Held
Does the emergency aid exception to the warrant requirement extend to animals?	Commonwealth: public policy and statutes protecting animals justify applying the emergency aid exception to allow warrantless entry to save animals.	Defendant: emergency aid exception should not apply to animals; warrantless entry into a home to rescue animals violates Fourth Amendment/art. 14 protections.	Yes — the emergency aid exception can apply to nonhuman animals when officers have objectively reasonable grounds to believe an animal is injured or in imminent danger and their conduct is reasonable.

Commonwealth v. Peters, 453 Mass. 818 (discussing emergency aid exception standards)
Commonwealth v. Entwistle, 463 Mass. 205 (distinguishing exigent‑circumstance standards and noting emergency aid doctrine)
Commonwealth v. Snell, 428 Mass. 766 (recognizing need to protect life justifies warrantless acts in emergencies)
Brigham City v. Stuart, 547 U.S. 398 (exigent‑circumstances/emergency aid principles)
Mincey v. Arizona, 437 U.S. 385 (life‑preserving aid can justify warrantless action)
State v. Stone, 321 Mont. 489 (holding animal suffering can create exigent circumstances to justify rescue)
Tuck v. United States, 477 A.2d 1115 (D.C. Ct. App. 1984) (recognizing preservation of animal life as exigency)