Hi David..........is your bird a rescue or an older bird? Just wondering if there might be a history of poor nutrition and poor housing that might have happened before you rescued your Zon. Otherwise I guess I would just have a vet check the feet out. I know they need natural perches so their feet don't develop sores on them. Kenny, above, says you have natural perches..........so I guess I would see a vet at this point just to make sure your zon doesn't need some kind of treatment. Maybe someone else will chime in here..........can you take a picture of it? I know it's hard to get our birds to cooperate for pictures.