Do Ravenclaw/Hufflepuff have House Beasts?

[boyd_smythe]

No: HPFGUIDX 80472

We have been led to believe that Fawkes was Godric Gryffindor's 
pet/companion at the founding of Hogwarts. It embodies his 
never-faltering, courageous spirit. And maybe he had a Griffin, too.

And Salazar Slytherin had the dangerous, snake-like basilisk. A good 
representation of his spirit, as well.

What about Ravenclaw and Hufflepuff? True, they've been far less 
important houses to the story thus far, but will that last or are we 
headed for the demystification of both houses and the discovery of 
their "House Beasts"? And what would they be? And if they still exist, 
then could play a part in the last books, particularly if there is an 
attack on Hogwarts?

Well, here's my guesses. Rowena Ravenclaw's Swedish Short-Snouted 
Dragon. And Helga Hufflepuff's graphorn.

OK, even I'm not convinced. Is JKR really going to leave both of those 
houses so undeveloped? Or will they be exposited as all the houses 
finally come together in books 6/7 to fight a common enemy?

-Remnant