A couple of days ago I let Chipper out of his cage, and he fluttered to the floor. He seemed unable to fly back up to the counter, and while he tried to climb the ladder that goes from floor to counter, he seemed unable to do that, either. (That's the ladder that Pepper runs up and down like a little monkey).
So I put his cage on the floor (he won't come to me), and he was able to climb that little ladder into his cage.
I talked to the vet who said that it sounds as if Chipper has some neurological damage. He may get better, or he may stay the same, but he does not expect the bird to get any worse.
This morning he flew down, but flew slightly farther than before. I hope that's a good sign.
Yesterday I posted a photo of an unusual painted mural on a ceiling. Today's mural is that of a bathroom floor.