Tenure: 114th–119th Congresses
Years of Service: 2015–Present
A Marine Corps combat veteran, Seth Moulton was elected to the U.S. House in 2014, and he’s been a leading animal advocate in the chamber ever since. Animal Wellness Action endorsed Rep. Moulton in the Democratic primary for U.S. Senate to be held on September 1. He’s challenged the incumbent Ed Markey, who has been in Congress since 1977 and served 20 terms in the House and Senate and has himself been a strong environmental advocate and who has also been outspoken on some animal protection issues. Moulton is 47, and Markey is 80, and they are competing to represent the Commonwealth of Massachusetts for the next six years for a seat almost certainly to be won by the primary victor.
Moulton has demonstrated a deep and consistent commitment to combatting animal cruelty as a matter of national policy, promoting fiscal responsibility by working to stop reckless federal expenditures, including a billion-dollar plan to kill North American barred owls in Pacific Coast states and animal testing practices that have proved ineffective and are driving up drug prices for regular Americans. Markey’s support for proceeding with the slaughter of North American barred owls was a key factor in tipping the endorsement to Moulton.
Moulton is on record in support of a very broad set of animal welfare initiatives circulating in Congress. He’s cosponsored the Fighting Inhumane Gambling and High-Risk Trafficking (FIGHT) Act, H.R. 3946, to strengthen federal enforcement against animal fighting and related criminal activity; the No Flight, No Fight Act, H.R. 7371, to stop the smuggling of fighting birds on commercial airlines; and the Animal Cruelty Enforcement (ACE) Act, H.R. 1477, to establish a dedicated unit at the Department of Justice to investigate and prosecute animal cruelty crimes.
His record extends to a wide set of more specialized issues in animal welfare. Moulton cosponsored the SAFE Act, H.R. 1661, to end the slaughter of American horses for human consumption and their export to foreign slaughter plants; the PAST Act to crack down on the soring of Tennessee Walking Horses; the Puppy Protection Act and Goldie’s Act to strengthen protections for dogs in commercial breeding operations; the Better CARE for Animals Act to improve federal enforcement of the Animal Welfare Act; and Violet’s Law to give animals used in federally funded research an opportunity for adoption or sanctuary placement.
He’s also cosponsored the Snowmobiles Aren’t Weapons (SAW) Act to prohibit the intentional use of motor vehicles to run down wolves and other mammals on federal lands; the MINKS Are Superspreaders Act to end mink farming in the United States; and H.J. Res. 111, the bipartisan Congressional Review Act resolution to overturn the U.S. Fish and Wildlife Service’s plan to kill approximately a half million barred owls in what is a sop to the West Coast timber industry and a tool to enable cutting of old growth forests and to incidentally take Northern spotted owls.
Representing a coastal district, Moulton has been one of the leaders in protecting highly endangered North Atlantic right whales and finding solutions to prevent deadly ship strikes, with just 350 of these whales surviving on the planet.
In terms of floor action, Moulton voted against legislation to strip federal protections from gray wolves; an amendment weakening Endangered Species Act protections on military lands; and an amendment that would have restricted federal support for innovative proteins to support our troops overseas. He also helped defeat an amendment to gut the Greyhound Protection Act, which would ban gambling on greyhound racing – a matter that voters in the Commonwealth handled on the November 2008 ballot.
His vote against final passage of the 2026 House Farm Bill was especially relevant to the people of the Commonwealth of Massachusetts. The legislation contained language that would overturn state farm animal welfare laws, including Massachusetts Question 3, approved by an astonishing 78% of voters in 2016. Moulton had previously joined congressional efforts opposing the EATS Act, now known as the Save Our Bacon Act, defending the rights of states to adopt animal welfare and food safety standards, in the absence of congressional action to do anything meaningful in these policy areas. The U.S. Supreme Court, in NPPC v. Ross, determined that California’s Prop 12, and by association Question 3, were a proper exercise of state authority on farm animal welfare and food safety.
In the Transportation and Infrastructure Committee, when the Build America 250 Act came up in 2026, Moulton favored the Van Drew-Titus amendment to combat the transport of horses for slaughter for human consumption. Moulton also supported House passage of the FDA Modernization Act 3.0, H.R. 2821, which passed the House by voice vote in July 2026. This bipartisan legislation advances implementation of landmark federal reforms allowing scientifically valid non-animal testing methods to replace animal tests in drug development.
In prior years, he voted to pass the Big Cat Public Safety Act, the Preventing Animal Cruelty and Torture Act, the Horseracing Integrity and Safety Act, and a wide range of other measures that hit the floor and have been enacted into law.
Taken together, these actions put Moulton in the forefront of animal protection in Congress. From combating animal fighting and horse slaughter to protecting wildlife, strengthening enforcement of our federal anti-cruelty laws, defending Massachusetts’s voter-approved animal welfare standards, and advancing modern alternatives to animal testing, he’s consistently supported practical reforms to prevent cruelty and protect animals.
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Notable Actions
119th Congress
✅ Cosponsor of the Save America’s Forgotten Equines (SAFE) Act, H.R. 1661, to ban U.S.-based horse slaughter and the export of horses for slaughter for human consumption.
✅ Cosponsor of Violet’s Law, H.R. 3246, to provide a second chance for dogs, cats, rabbits, guinea pigs, hamsters, and nonhuman primates used in federally funded research by requiring facilities to pursue adoption or sanctuary placement whenever feasible. The measure was later incorporated into the House-passed Farm, Food, and National Security Act.
✅ Cosponsored the Prevent All Soring Tactics (PAST) Act, H.R. 1684, to strengthen enforcement against the cruel practice of soring horses. The bill would ban devices associated with soring, require independent USDA-trained inspectors, increase penalties for violations, and strengthen the Horse Protection Act to better protect Tennessee Walking Horses and other affected breeds from intentional abuse.
✅Cosponsored the Puppy Protection Act, H.R. 2253, bipartisan legislation to strengthen federal standards of care for dogs kept by commercial breeders by improving requirements for housing, veterinary care, exercise, socialization, and humane breeding practices.
✅ Cosponsor of the Better CARE for Animals Act, H.R. 3112, to strengthen enforcement of the Animal Welfare Act by expanding federal authority to investigate and prosecute animal cruelty violations and improve coordination between the U.S. Department of Agriculture and the Department of Justice.
✅Cosponsored Goldie’s Act, H.R. 349, bipartisan legislation to strengthen enforcement of the Animal Welfare Act by requiring more frequent inspections, faster reporting of violations, and improved protections for animals suffering abuse or neglect.
✅ Cosponsor of the Fighting Inhumane Gambling and High-Risk Trafficking (FIGHT) Act, H.R. 3946, to strengthen federal enforcement against animal fighting and related criminal activity.
✅ Cosponsor of the No Flight, No Fight Act, H.R. 7371, to stop the smuggling of fighting birds via commercial airlines—an illicit practice that has gone largely unenforced since Congress prohibited the interstate and foreign transport of fighting birds in 2002.
✅ Cosponsor of the Animal Cruelty Enforcement (ACE) Act, H.R. 1477, to establish a dedicated DOJ unit to investigate and prosecute animal cruelty crimes.
✅ Cosponsor of Minks in Narrowly Kept Spaces (MINKS) Are Superspreaders Act, H.R. 6513, to end mink farming in the U.S.
✅ Cosponsor of the Snowmobiles Aren’t Weapons (SAW) Act, H.R. 6864, to prohibit any person from intentionally using a motor vehicle to run over or kill wolves and other mammals on federal lands.
✅ Cosponsor of the Stop Billion-Dollar FWS Plan to Kill Half a Million Owls, H.J. Res. 111, a Congressional Review Act resolution to nullify the U.S. Fish and Wildlife Service plan to kill approximately 450,000 barred owls to reduce competition with northern spotted owls.
✅ Signed congressional letter opposing the SOB Act that would erode states’ rights, undermine family farmers, and expand foreign influence over U.S. food production
✅ Voted “Aye” on the Van Drew–Titus Amendment (Recorded Vote No. 98-pg. 46) to H.R. 8870 (Transportation and Infrastructure Committee Vote), to incorporate key provisions of the Save America’s Forgotten Equines (SAFE) Act into the Build America 250 Act. The bipartisan amendment would permanently prohibit the export of American horses to Canada, Mexico, or other countries for slaughter for human consumption and ban the use of dangerous double-decker trailers to transport horses. The amendment was adopted by a 34–30 vote. An “Aye” vote is the pro-animal position because it advanced legislation to end the slaughter pipeline for American horses.
✅ Supported House passage of the FDA Modernization Act 3.0, H.R. 2821, which passed by voice vote under suspension of the rules on July 20, 2026. The bipartisan legislation directs the FDA to update its regulations to fully implement the 2022 law allowing scientifically valid non-animal methods to be used instead of animal testing in drug development.
➖ Did Not Vote on H.R. 556, the Protecting Access for Hunters and Anglers Act (House Roll Call Vote 93), to prohibit federal land management agencies from restricting the use of toxic lead ammunition and fishing tackle on public lands and waters to protect wildlife from poisoning. The bill passed the House 215–202. A “Nay” vote is the pro-animal vote.
✅ Voted “Nay” on H.R. 845, the Pet and Livestock Protection Act (House Roll Call Vote 360), to remove federal Endangered Species Act protections for gray wolves across much of the United States and restricted judicial review of future wolf management decisions. The bill passed the House 211–204. A “Nay” vote is the pro-animal position.
✅ Voted “Nay” on the Riley Moore Amendment to H.R. 7567 (House Roll Call Vote 149), to weaken the Farm Bill’s Greyhound Protection Act provisions by creating a special exemption allowing commercial greyhound racing to continue in West Virginia indefinitely. The House rejected the amendment 187-237. A “Nay” vote is the pro-animal position.
✅ Voted “Nay” on H.R. 7567, the Farm, Food, and National Security Act (House Roll Call Vote 154), to pass the Farm Bill, which included a provision to overturn state laws in California and Massachusetts restricting in-state sales of fresh pork sourced from farms that do not provide minimum space requirements for the housing of pregnant pigs. The bill passed the House 224–200. A “Nay” vote is the pro-animal position.
✅ Voted “Nay” on the Biggs Amendment to H.R. 3838 (House Roll Call Vote 259), to exempt defense-related activities from the requirements of the Endangered Species Act, eliminating protections for endangered and threatened species and their critical habitat on military lands and during defense operations. The House rejected the amendment 200–228. A “Nay” vote is the pro-animal position.
✅ Voted “Nay” on the Greene Amendment to H.R. 3838 (House Roll Call Vote 254), to prohibit the Department of Defense from using FY2026 funds for the research, development, procurement, or promotion of cell-cultured meat, an emerging alternative to conventional slaughter-based meat production. The House rejected the amendment 194–236, with 1 voting present. A “Nay” vote is the pro-animal position.
118th Congress
✅ Cosponsor of the Save America’s Forgotten Equines (SAFE) Act, H.R. 3475, to ban U.S.-based horse slaughter and the export of horses for slaughter for human consumption.
✅ Cosponsor of Greyhound Protection Act, H.R. 3894, to phase out U.S. greyhound racing, a practice long in decline and operational at just two tracks
✅ Cosponsor of Violet’s Law, H.R. 1465, to provide a second chance for dogs, cats, rabbits, guinea pigs, hamsters, and nonhuman primates used in federally funded research by requiring facilities to pursue adoption or sanctuary placement whenever feasible.
✅Cosponsored Goldie’s Act, H.R. 1788, bipartisan legislation to strengthen enforcement of the Animal Welfare Act by requiring more frequent inspections, faster reporting of violations, and improved protections for animals suffering abuse or neglect.
✅Cosponsored the Puppy Protection Act, H.R. 1624, bipartisan legislation to strengthen federal standards of care for dogs kept by commercial breeders by improving requirements for housing, veterinary care, exercise, socialization, and humane breeding practices.
✅ Cosponsored the Prevent All Soring Tactics (PAST) Act, H.R. 3090, bipartisan legislation to strengthen enforcement against the cruel practice of soring horses. The bill would ban devices associated with soring, require independent USDA-trained inspectors, increase penalties for violations, and strengthen the Horse Protection Act to better protect Tennessee Walking Horses and other affected breeds from intentional abuse.
✅ Cosponsor of the Better CARE for Animals Act, H.R. 5041, to strengthen enforcement of the Animal Welfare Act by expanding federal authority to investigate and prosecute animal cruelty violations and improve coordination between the U.S. Department of Agriculture and the Department of Justice.
✅ Voted “Nay” on H.R. 764 (House Roll Call Vote 169), legislation to remove federal protections for gray wolves under the Endangered Species Act across most of the United States and return management authority to the states. Wildlife advocates warned that the bill would undermine science-based wildlife management and threaten the long-term recovery of gray wolf populations. The House passed the bill 209–205. A “Nay” vote is the pro-animal position.
✅ Voted “Nay” on H.R. 615 (House Roll Call Vote 167), legislation to bar the Department of the Interior and the Department of Agriculture from prohibiting or regulating the use of toxic lead ammunition and fishing tackle on federal lands and waters made available for hunting or fishing. Lead ammunition and tackle poison wildlife, including eagles, loons, condors, and other animals that ingest spent lead fragments or lost fishing gear. The House passed the bill 214–201. A “Nay” vote is the pro-animal position.
117th Congress
✅ Cosponsor of the Save America’s Forgotten Equines (SAFE) Act, H.R. 3355, to ban U.S.-based horse slaughter and the export of horses for slaughter for human consumption.
✅ Cosponsor of the Prevent All Soring Tactics (PAST) Act, H.R. 5441, to strengthen enforcement of the Horse Protection Act and help end the cruel practice of “soring” Tennessee Walking Horses, Racking Horses, and Spotted Saddle Horses. Soring involves intentionally inflicting severe pain on horses’ legs and hooves through caustic chemicals, chains, pressure devices, or other abusive methods to force an exaggerated, high-stepping gait known as the “Big Lick.”
✅Cosponsored the Shark Fin Sales Elimination Act, H.R. 2811, to end the U.S. commercial trade in shark fins by prohibiting their sale, purchase, and transport, helping reduce the global demand that drives the cruel practice of shark finning. Core provisions of the bill were later incorporated into the James M. Inhofe National Defense Authorization Act for Fiscal Year 2023, which was signed into law in December 2022, making the United States one of the world’s largest nations to ban the domestic shark fin trade.
✅Cosponsored the Puppy Protection Act, H.R. 2840, bipartisan legislation to strengthen federal standards of care for dogs kept by commercial breeders by improving requirements for housing, veterinary care, exercise, socialization, and humane breeding practices.
✅ Voted “Aye” on the motion to suspend the rules and pass the Prevent All Soring Tactics (PAST) Act, H.R. 5441 (House Roll Call Vote 478). The bill would strengthen enforcement of the Horse Protection Act and help end the cruel practice of “soring” Tennessee Walking Horses, Racking Horses, and Spotted Saddle Horses. Soring involves intentionally inflicting severe pain on horses’ legs and hooves through caustic chemicals, chains, pressure devices, or other abusive methods to force an exaggerated, high-stepping gait known as the “Big Lick.” The motion was agreed to by a vote of 304–111, exceeding the two-thirds majority required under the suspension of the rules procedure. An “Aye” vote is the pro-animal position.
✅ Voted “Aye” Big Cat Public Safety Act, H.R. 263 (House Roll Call Vote 415), to end the private possession and commercial breeding of lions, tigers, leopards, cheetahs, jaguars, cougars, and other big cats while prohibiting public contact with these animals. The legislation targeted the exploitative cub-petting industry and roadside zoos, where big cats are repeatedly bred, handled, and discarded, while strengthening protections for both animals and public safety. An “Aye” vote is the pro-animal position.
116th Congress
✅ Cosponsor of the Big Cat Public Safety Act, H.R. 1380, to prohibit private ownership and breeding of lions, tigers, and other big cats while restricting public contact with these dangerous wild animals. The bill was designed to curb the exploitation of big cats in roadside zoos and cub-petting operations, improve animal welfare, and enhance public safety by limiting private possession of these species.
✅ Voted “Aye” on the H.R. 1380 – Big Cat Public Safety Act (House Roll Call Vote 232), legislation to prohibit private ownership and breeding of lions, tigers, and other big cats while restricting public contact with these dangerous wild animals. The bill was designed to curb the exploitation of big cats in roadside zoos and cub-petting operations, improve animal welfare, and enhance public safety by limiting private possession of these species. The House passed the bill 272–114. An “Aye” vote is the pro-animal position.
✅ Voted “Aye” on the Stevens Amendment (House Roll Call Vote 373) to the FY2020 Commerce, Justice, Science, and Related Agencies Appropriations Act, allocating $2 million to create an Animal Cruelty section within the Department of Justice. An “Aye” vote is the pro-animal position because it supports stronger federal enforcement of existing animal protection laws.
✅ Voted “Aye” on the Buchanan Amendment (House Roll Call Vote 380) to the FY2020 Interior, Environment, and Related Agencies Appropriations Act, prohibiting the Department of the Interior from issuing import permits for trophies of threatened elephant and lions from Tanzania, Zambia, and Zimbabwe. An “Aye” vote is the pro-animal position because it supports stronger protections for threatened wildlife by restricting the import of hunting trophies.
115th Congress
✅ Cosponsored the Dog and Cat Meat Trade Prohibition Act, H.R. 1406, bipartisan legislation to prohibit the slaughter of dogs and cats for human consumption and ban the sale, transport, possession, and trade of dogs, cats, and their parts for that purpose. The bill established federal criminal penalties to ensure the United States maintains a clear prohibition on the dog and cat meat trade.
✅ Cosponsored the Humane Cosmetics Act, H.R. 2790, bipartisan legislation to phase out animal testing for cosmetics and prohibit the sale of cosmetics developed or manufactured using new animal testing. The bill encouraged the use of modern, non-animal testing methods while helping align U.S. policy with the growing international movement to end cosmetic testing on animals.
✅ Cosponsor of the Prevent All Soring Tactics (PAST) Act, H.R. 1847, to strengthen enforcement of the Horse Protection Act and help end the cruel practice of “soring” Tennessee Walking Horses, Racking Horses, and Spotted Saddle Horses. Soring involves intentionally inflicting severe pain on horses’ legs and hooves through caustic chemicals, chains, pressure devices, or other abusive methods to force an exaggerated, high-stepping gait known as the “Big Lick.”
✅ Voted “Nay” on H.J. Res. 69, a Congressional Review Act resolution (House Roll Call Vote 98) to overturn an Obama administration rule protecting wildlife on National Wildlife Refuges in Alaska. The rule prohibited inhumane predator-control practices, including killing bear cubs and wolf pups in their dens, baiting bears with food to shoot them at close range, and aerial shooting of wolves and other predators. The resolution passed Congress and was signed into law, eliminating these federal wildlife protections. A “Nay” vote is the pro-animal position because it sought to preserve safeguards against some of the cruelest and most unsporting predator-killing practices on federal refuge lands.
✅Voted “Aye” on the Roskam–Blumenauer Amendment (House Roll Call Vote 202), to H.R. 2, the Agriculture and Nutrition Act of 2018, to strengthen the federal animal fighting law by clarifying that its prohibitions apply throughout all U.S. territories. The amendment closed a legal loophole that had allowed organized dogfighting and cockfighting to continue in certain U.S. territories despite being illegal elsewhere in the United States. An “Aye” vote is the pro-animal position because it strengthened federal protections against organized animal fighting.