I did notice lines on Bella's keet pics were diff. Choc and brown per GF feather a light tan until the 2-3 month molt. Jess's colors are those I mentioned not having heard of before. I've thought abt that a lot - how new colors come about -w/o any epiphanies.Interesting that Bella’s babies have random brown feathers! In “cinnamon”, I’m using Jessica Farmer’s guide terms for the color, where Cinnamon is the fully pearled version of Blonde. Yes, same term used for different colors in Oz vs US! I’ve seen very little about US Cinnamon guineas and they aren’t offered by Guinea Farm so I think they must be quite rare. GF does offer Blonde, Buff, and Buff Dundotte. If you search the Guineafowl VGS FB group there are some posts about American Cinnamon.
In your Bella baby pic above, you can see that she was fully pearled. But @NikkiRenee ’s baby pic shows a semipearled keet.
There are far more recessive genes than dominant. It's still beyond my egg sense how one could breed a variety with any certainty.