WASHINGTON — Roger Stone has always lived in a dog-eat-dog world.

So it was apt that he was charged with skulduggery in part for threatening to kidnap a therapy dog, a fluffy, sweet-faced Coton de Tuléar, belonging to Randy Credico, a New York radio host.

Robert Mueller believes that Credico, a pal of Julian Assange, served as an intermediary with WikiLeaks for Stone. Mueller’s indictment charges that Stone called Credico “a rat” and “a stoolie” because he believed that the radio host was not going to back up what the special counsel says is Stone’s false story about contacts with WikiLeaks, which disseminated Russia’s hacked emails from the D.N.C. and Hillary Clinton’s campaign chairman.

Stone emailed Credico that he would “take that dog away from you,” the indictment says, later adding: “I am so ready. Let’s get it on. Prepare to die (expletive).”

As the owner of two Yorkies, Stone clearly knows how scary it is when a beloved dog is in harm’s way. When he emerged from court on Friday, he immediately complained that F.B.I. agents had “terrorized” his dogs when they came to arrest him at dawn at his home in Fort Lauderdale.