The Craigslist website is filled with pet advertisements for people looking to rent, buy, or sell a pet.
A few days ago, the company reported it had suspended about 5,000 listings of dogs and cats.
That included nearly 1,000 for the same breed of dog.
Craigslist has been under scrutiny by animal rights activists for years, and a number of the listings for pets on its site have been flagged for abuse.
In May, a California man who had been selling dogs for years and had an online business for months was arrested for animal cruelty after allegedly selling pets for as little as $50 a day.
The man also allegedly used Craigslist to advertise a dog as a “spay or neuter” and a “rescue” of a dog in need.
The Craigslist suspensions, which came with a $500 fine, have been criticized by animal lovers and animal welfare groups.
But the company defended itself, saying it has been a “critical platform” for pet adoption and the sale of pets, according to ABC News.
The company also said that it has “zero tolerance” for abusive ads, and that its ads are only reviewed on a case-by-case basis.
Craigslist’s chief operating officer, David Cohen, said in a statement to ABC that the company is “working diligently with the FBI to identify those responsible for this terrible offense and prosecute them to the fullest extent of the law.”