One blog guessed Stephen Green's lede.

by Smitty

That was Political Castaway:

Here's the story, as it is being reported. Bo was sold to a D.C. resident late last year or early this year. Another dog out of the same litter was sold to Ted Kennedy. Bo was returned to the breeder in March and was sent directly to the Kennedy's dog trainer in Northern Virginia. From there, he is to become the newest White House resident.
Reading between the lines, is it difficult to imagine a typical D.C. power play here? The Kennedys, because they are the Kennedys, saw an opportunity to do a favor for the White House. They arranged for the unnamed third party to "return" his dog to the breeder (itself an unusual occurence short of health concerns for the puppy) so that the Kennedys could become the heroes in locating just the perfect dog for the Obamas.

Given that Vodkapundit's (subscriber only, what are you waiting for?) PJTV segment is called "Hair of the Dog", you had to expect a Bo appearance, and it was worth the wait.
But if the Kennedys masterminded the dog placement, could it have been an allusion to that famous non-quotation of Harry Truman: "If you want a friend in Washington, get a dog"?