If your puppy is sick
Massachusetts law protects people who buy dogs and cats from pet shops.
What you can ask for
- A substitute animal
- A full refund
Minimum age to sell a puppy
In Massachusetts a puppy must be at least 8 weeks old to be sold.
Federal Animal Welfare Act rules (9 C.F.R. § 2.130) bar licensed dealers from shipping puppies under 8 weeks old that are not weaned, in every state.
What to do if you bought a sick puppy
- Take the puppy to a veterinarian right away and ask for the diagnosis in writing, within 14 days of the sale.
- Tell the seller in writing, with a copy of the veterinarian's statement, and keep proof that you sent it.
- Choose what you want: a refund, an exchange or keeping the puppy with the vet costs paid, as far as the law allows.
- Keep everything: the contract, the ad, messages, receipts and vet records.
- If the seller refuses, contact the consumer protection office of the Massachusetts attorney general or file in small claims court.
Buying a puppy in Massachusetts
We list 142 dog breeders in Massachusetts, with phone, website, public reviews and a map.
This is a plain-language summary, not legal advice. Laws change and have exceptions: read the statute or ask the consumer protection office of your state attorney general before you act.
Summary based on the state statutes as listed by the Animal Legal & Historical Center of Michigan State University College of Law (purchaser protection laws as of 2023, minimum sale age as of 2025).
Questions
Does Massachusetts have a puppy lemon law?
Yes. Massachusetts law (330 C.M.R. 12.05) protects people who buy dogs and cats from pet shops. You have 14 days after the sale to have a veterinarian certify an illness.
How long do I have to return a sick puppy in Massachusetts?
14 days from the sale for an illness or disease. A veterinarian has to examine the puppy and put the problem in writing within that time, and the law only covers sales by pet shops.
How old does a puppy have to be to be sold in Massachusetts?
At least 8 weeks. The rule applies to pet shops and other commercial sellers (M.G.L.A. 129 § 39G; 330 C.M.R. 12.05).
Does the Massachusetts lemon law cover private breeders?
It covers pet shops. A small hobby breeder may fall outside it, so ask for a written contract with a health guarantee whoever you buy from.