The Humane Society of the United States and Weil, Gotshal & Manges have filed what they believe to be the first class action lawsuit against a U.S. puppy dealer, alleging that the company sold puppies with genetic defects and contagious parasitic infections and failed to reimburse customers for the sick animals or their medical problems.

Weil Gotshal, led by New York litigator Paul Ferrillo, filed the lawsuit on a pro bono basis on behalf of the Humane Society in Broward County Circuit Court against the south Florida-based Wizard of Claws. The lawsuit so far represents about 100 class members, said Jonathan Lovvorn, who heads up the Humane Society’s litigation department. Each representative will have damages of $2,000 to $5,000, making the lawsuit worth hundreds of thousands of dollars, he said.