My best guess is he's about 4 months old / 20 weeks - I've estimated from how old the store told me the clutch was...maybe yours just isn't big yet because he got sick....although him not wanting millet is a bit odd because Cecil treats it like it's birdie-crack lol
Thanks so much for the compliments - yup I have a digi - got it for Xmas I wanted one for the longest time and finally got one

D