They were tiny when I first got them, so I had them in small enclosures and gradually moved them into larger enclosures. They both got moved into their current enclosure at two years of age. It's a huge enclosure when you're standing next to it (or in it), but they could do with something larger and if I had a yard I'd get them outdoors into an aviary. You're going to find yourself giving up a lot of floor space for an adult spenceri, too, for you can't go vertical with them.