You can help him out by gently scritching him. I help Chipper.
A larger cage will be much better than a small one. Chipper changed a lot when she got her huge cage, SO much happier! She always had a large one though.
In a huge cage, they can have more and larger toys. Big bendable rope perches, large and small swings, bells, all kinds of perches and play centers to choose from. Toys go all the way down the cage and she uses every inch.
They need to be able to fly and jump in the cage. Chipper has room for a big shaggy swing, and other swings and lots of wood and string toys and bells.
I have her out a lot, but she just adores being about to play inside, even though she has five playgyms with toys! To get them to eat very well, make birdie breads and veggie mash. Chipper doesn't like to eat veggies plain, but boy will she eat the mash I make and the breads and muffins have wonderful ingredients.
I can give you the recipes if you like. Easy.