We have the 2 that are handicapped, one was the metabolic bone disease and both of her feet are wacky, Frito, and then Gabby, one of her legs are bent at the "hip" and the foot is turned inwards. Frito is the only one who has a special cage design, Gabby just has lots of shelves where she can rest (and chew said shelves, lol ). Frito has to have her cage papers changed daily though and she won't let Pat in to it! We raised the bottom to about 2" below the food and water bowls so she could crawl around and play. She loves that but what a mess, she will poop and walk through it or put her beak in it. I can't change her cage each time she poops and the thought of greys being so smart fly's right out the window when I see her do that!