Is this cage too small for my rabbits?

Yes, that is far too small for a pair, and so is your larger cage. Look into an X-pen either instead-of or attached to the cage you already have. a href="http://www.sandiegorabbits.org/adoption/pen_living.html" rel="nofollow"http://www.sandiegorabbits.org/adoption/…/a With a larger rabbit and a smaller one, I'd be looking for at least 12 square feet (and that would be provided they get at least 4-6 hours out of the cage daily for exercise).