If I am not mistaken, they were responding to a neighbor complaint. He does have a website, but the man doesn't sell a slew of dogs.
And he usually meets the transporter, or flies the pups with his wife who works for an airline. So I really don't think his address is out there public.
So who knows how they really found him, but I think she was expecting a different breed of dog when she arrived, because when she asked what breed they were, she said she had never heard of them before.