The genetics calculator seems to think your male is green series. Which he is not.
With this pair you would never get any green series chicks (grey (sf) green). Since both parents are blue series they can only produce blue series chicks.
With that being said, Grey is a dominant gene and if your male has produced a blue non-grey chick, then that means he is not Double factor grey but rather single factor.
Double factor greys would produce 100% grey chicks.
If he has produced blue chicks, then he's a handsome single factor grey. Genetically, SF greys have a 50% chance of producing a grey and a 50% chance of producing a non-grey (blue) with each fertile egg. DF greys will only produce sf greys when paired with a non-grey.
I think you got super lucky getting all those beautiful grey babies.
Yes, you are correct. Females cannot be split for cinnamon.
And to be honest, I'm not sure how. I've never really used a genetics calculator before! hehe
......and all this time i thought he was a DF grey.....only about a year haha, his 1st clutch was 2 YF grey hens and 1 white face grey male, his second clutch was 2 YF grey's (one male one female and 1 blue female
Then with this hen he has had 1 wf hen and now he has 1 blue hen......
It's a shame he is 5 years old ):
hes one of my best males for breeding, hes currently got his chick and a foster chick, then hen came out of condition and started to attack him so i removed her
Hehe. It's possible that he has a dark factor as well, causing his grey to be darker than what you'd expect on a sf. Has he produced any cobalt blues or were they all sky blue?
He is quite the handsome man! I've always had a fondness for greys.
I wish I could get into breeding budgies, but currently I don't have the space or resources to do so. So for now, it's just a future goal of mine.