They were selling the wolf dog for drugs. Meth to be exact. They'd get at least a thousand dollars' worth - maybe more - for the sale of the wolf dog.
When police caught wind of the drug deal, undercover agents visited the San Bernardino, California, property where the wolf dog was being kept. Posing as meth buyers, the agents intercepted the exchange and confiscated the wolf dog, who'd been named Wolfee by his owners.