Yeah, that would explain it, if they had an Australorp dad and RIR mom. The website stated RIR male x Australorp female, so I assumed that was what they were doing.@FunClucks now I have to google that gold x silver gene chart...I can remember the "gold male over silver female" but not the other way around
Ok, so are Australorps silver based? If so that would explain the silver leakage.
This page has a great gold / silver cart if you scroll down a little.
https://www.featherfernfarmstead.com/about-the-colors.html
So if the Australorps are silver based, then Ombre and Yoghurt would have an Australorp dad and a RIR mom. Then your one with the red leakage would have a RIR dad and an Australorp mom.
As for the feather tightness and character difference, I have had the whole spectrum of RIR's from the hatchery, I have had gorgeous deep colored larger ones and some really scrompy ones with paler feathers and smaller bodies. It's possible she just inherited her nervousness and different feathering from one of her parents. I've had the same experience with the Australorps too, they were not consistent from the hatchery at all.
There are over a dozen genes that impact the brown pigment on the egg shell, so what color she lays is dependent on how those genes were inherited and then how they interact. I'm not saying they did, but if they had used another breed, especially leghorn, to work on increasing the egg production, then they apparently have a zinc white gene that can be passed along and it somehow makes the eggs paler, I'm not sure how though that's way deeper genetics than I know!
I did breeding of a very dark Production Red (very similar to RIR) male over a variety of differently feathered females, and the ones whose moms had silver leakage in their neck feathers and around the base of their neck - none of their babies ended up with silver leakage. Same patterning in the feathers, but it all turned gold (red). It was neat to see the genetics charts and predictions in action. The only straight up gray chicken I had, when bred with the male Production Red, produced a grey bodied chick with red leakage on neck/head, similar to what the Production Blues are supposed to look like.
I can remember the "gold male over silver female" but not the other way around
