Mass. Gen. Laws ch. 131 § 19B
Any person authorized under section 4 to take and possess mammals may transport them within the commonwealth for the purpose of euthanasia.
A person authorized under this chapter to take and possess birds, reptiles, amphibians or mammals shall not put an animal to death by the use of drowning. Any such person who intentionally or knowingly puts an animal to death by the use of drowning shall, for a first offense, be punished by imprisonment in the state prison for not more than 7 years or in a jail or house of correction for not more than 2 1/2 years, by a fine of not more than $5,000 or by both such fine and imprisonment and, for a second or subsequent offense, by imprisonment in the state prison for not more than 10 years, by a fine of not more than $10,000 or by both such fine and imprisonment.
The paragraph above shall not take effect until the department of Fish and Game, in consultation with the Environmental Police; the division of Animal Health; and the department of Agricultural Resources, file a report with the clerks of the senate and house of representatives, the house and senate chairs of the joint committee on municipalities and regional government, and the house and senate committees on ways and means, identifying best practices related to trapping and pest control, to include alternatives to drowning. Such report shall be filed on or before June 1, 2019. Provided that if said report is not filed on or before June 1, 2019, the above paragraph shall take effect on June 1, 2019.
Mass. Gen. Laws ch. 131, § 19B