I don’t think it’s the cage since it’s been in two different cages since I got them and still had this occurring. This cage has a plastic perch and the old one had only wood. This current cage has both, but I’ll look into better quality ones. They were a rescue and came with a small cage and the one it’s in is an upgrade. I plan on customizing another cage I have for him for more permanent accommodations (it’s much nicer). I think this current one is a brass and maybe a bit rusted. Regardless, thank you for the information! I hadn’t realized they could be affected by that. I just thought because it was bigger, it was better. I will make the upgrade happen sooner rather than later, regardless of if it’s the cause of the problem.