Buy 2 of those double cages and take the divider out. That way both birds can have lots of space. Don't let people tell you a too can be in a smaller cage than a macaw!!!!!! A cockatoo and a macaw are almost identical in size, just longer tail feathers. Cockatoos NEED just as much space as a large macaw. NEVER< EVER< EVER stuff a large too into a small cage. Is that extra 2 feet really worth a plucked unhappy bird? Check out
www.mytoos.com and then consider which cage to purchase. Aviaries are great for birds!