You’ll find cages in many different shapes, including square, rectangular, circle, and even pagoda-style shapes. While some angles to the cage give your bird a variety of areas to hide when he feels insecure, remember that the more angles there are, the more difficult it will be to clean the cage.Some bird specialists caution that round cages are not really suitable, as they don’t give the bird a reference point for location or a sense of security, leading to psychological distress. For the most part, a rectangular cage is the easiest to clean and find accessories for, and many agree that it keeps birds the happiest.