Jack's a real cutie! I'm waiting for a photo of little Eaties.
I noticed a couple of things in the photo you may not be aware of. It looks like Jack has lost tail feathers, it may be because he's climbing on the sides of his small cage. It would be great if he had more space and a variety of perches other than dowel to stand on. Please be very careful with those bells too, I know birds love them but the bells contain zinc which can be toxic to parrots. Tiny cockatiel and budgie beaks or little toes can get caught in the bell and cause injury too.