A. 
Any dog which, according to the records of Animal Control, has inflicted injury on a human being without provocation on public or private property; or
B. 
Any dog with a known propensity, tendency or disposition to attack unprovoked, to cause injury, or to otherwise threaten the safety of human beings or domestic animals; or
C. 
Any dog owned or harbored primarily or in part for the purpose of dog fighting or any dog trained for dog fighting; or
D. 
Any dog which, unprovoked, chases or approaches a person or domestic animal upon the streets, sidewalks or any public or private property in a menacing fashion or apparent attitude of attack.
Upon receipt of an Affidavit of Complaint signed by one or more persons made under oath before an Animal Control Officer, setting forth the nature and date of the act, the owner of the animal, the address of the owner and the description of the animal doing such act, the Animal Control Officer shall investigate the complaint to determine if in fact the animal is dangerous. Exemptions: No dog may be declared dangerous if the threat, injury or damage was sustained by a person who, at the time, was committing a willful trespass or tort upon the premises occupied. Any dog used in law enforcement shall be exempt. An incident bite fee of $50 per incident shall be charged to the owner.
The Animal Control Officer after investigation may issue an interim order that such dog be restrained or muzzled for a period not to exceed 14 days to enable the Board of Selectmen or their designee to set up a hearing. If the Selectmen or their designee fail to act during the period of the interim order, upon expiration of the period the interim order automatically is vacated.
A. 
Once a dog has been deemed dangerous as a result of a hearing, some or all of the following actions will be required of the dog owner:
(1) 
Enclosure required. The dog must be securely confined indoors or in a securely enclosed locked pen or structure, suitable to prevent the entry of young children and designed to prevent the animal from escaping. Such pen or structure shall have secure sides and secure top to prevent the dog from escaping over, under or through the structure and shall also provide protection from the elements. Such pen or structure shall be at least six feet in height and made from material so that the dog cannot put its head through the sides and a child cannot put its hand or fingers through the sides. A dangerous dog shall be considered at large, even if on the owner/keeper's property, if not so confined.
(2) 
Muzzle required. When off its owner's property a dog deemed dangerous shall be kept on a secure leash held by an adult that can control the dog and muzzled in such a manner as not to cause injury to the dog or interfere with the dog's vision or respiration but as to prevent it from biting a person or another animal.
(3) 
Unprovoked severe or fatal attack would result in the dog being humanely euthanized (severe injury means physical injury that results in broken bones or disfiguring lacerations requiring multiple sutures or cosmetic surgery).
(4) 
Warnings. The owner or keeper shall display a sign on his or her premises warning that there is a dangerous dog on the property. This sign shall be visible and capable of being read from the public highway or thoroughfare. In addition, the owner shall conspicuously display a sign with a symbol warning children of the presence of a dangerous dog.
B. 
Notification. After the hearing the owner or keeper of the dog will receive in writing within seven days the requirements to be met according to the Town. This notice will be served in hand. The owner or keeper of the dog has 10 days to appeal this order at the District Court in accordance with M.G.L. ch. 140.
C. 
Inspection. Animal Control will inspect enclosures at least twice a year and make inquiries whenever necessary to ensure compliance with the provisions.
D. 
If the owner or keeper of a dog that has been deemed dangerous is unwilling or unable to comply with the above regulations for keeping such an animal then he or she shall have the animal humanely euthanized by a licensed veterinarian.
A. 
Any dangerous dog shall be immediately confiscated by an Animal Control Officer if the dog:
(1) 
Is not validly registered.
(2) 
Is not maintained in the proper enclosure.
(3) 
Is outside of the dwelling of the owner or outside of the proper enclosure and not under the physical restraint of the owner.
B. 
If the dog has bitten while at large it will be held by the Animal Control Department for a ten-day quarantine and thereafter destroyed in an expeditious and humane manner. If the animal does not need to be held for quarantine, it will be euthanized immediately. The dog owner or keeper shall be responsible for payment of all fees, boarding costs and other related expenses incurred by the Town during this period.