This is the current #7 from Ken Jennings Tuesday Trivia:

Originally Posted by ken jennings
What unusual distinction is shared by these animals, and no others? Blackbirds, bluejays, dogs, horses, monkeys, octopi, pigs, raccoons, walruses.

No, the answer is not that they are all KLT acronyms.(Nor that they were never KLT acronyms.)

And you can't search for the answer in his archive because he doesn't give out the answers until the following week.