It’s a good idea to have perches of different diameter too. Otherwise constantly wrapping their feet around the same size perch, birds can develop sores on their feet. Just like how if you have a shoe that rubs your foot on the same spot every time, you get sore. Birds don’t have shoes but they have perches. So having different size perches, dowels, branches and limbs is not only a good idea… its pretty much mandatory for your bird’s health.
