To end the cruel treatment of dogs in mass breeding operations.

In puppy mills, mother dogs spend their entire lives in cramped cages with little to no personal attention. When the mother and father dogs can no longer breed, they are abandoned or killed. Due to poor sanitation, overbreeding and a lack of preventive veterinary care, the puppies from puppy mills frequently suffer from a variety of health issues, creating heartbreaking challenges for families who should be enjoying the delights of adopting a new family member.

Dog in filthy cage in a puppy mill

The Horrible Hundred is a list of known, problematic puppy breeding and/or puppy brokering facilities, released annually by the Humane Society of the United States, in an effort to inform the public about common, recurring problems at puppy mills.

Meredith Lee / The HSUS
What are puppy mills?

Puppy mills are inhumane high-volume dog breeding facilities that churn out puppies for profit, ignoring the needs of the pups and their mothers. Dogs from puppy mills are often sick and unsocialized. Puppy mills commonly sell through internet sales, online classified ads, flea markets and pet stores. In fact, the majority of puppies sold in pet stores and online are from puppy mills. Responsible breeders will be happy to meet you in person and show you where the puppy was born and raised—and where their mom lives too.

Puppy mill facts

Questions about puppy mills? Learn more about how you can help stop them. Read Our FAQ

Dogs in cages during a rescue from a North Carolina puppy mill
10,000
PUPPY MILLS

Are estimated to be currently active in the United States.

Breeder mom with puppies at temp shelter from puppy mill rescue in North Carolina
500,000
DOGS

Are kept solely for breeding purposes in all puppy mills.

Puppies at temp shelter from puppy mill rescue in North Carolina
2.6MILLION
PUPPIES

Are sold each year after originating from a puppy mill.

Dog in cage at a puppy mill before being rescued

There are an estimated 10,000 puppy mills across the country, where mother dogs spend their entire lives in cramped cages. Your generous gift will save puppies and their moms from suffering in these cruel mass-breeding operations by supporting our work to stop the vicious cycle of puppy mills.

Meredith Lee / The HSUS