Cross breeding for colours

[Fenrisulfr]

As @shrimpsilkies said, it depends, if the Fee gene is homozygous or heterozygous, the brown/reddish can be more pronounced on hets.

This roo here is hom Fee factor:

Whereas this one is het:

 

[Judykaymayes]

Hmmm... Looking back at my pictures, I guess the roos did have a bit of rust in them. I haven't had a falb fee roo in a while!
View attachment 2583664

What color is the fall free

 

[Nabiki]

What color is the fall free

The one in the front is the falb fee.

 

[Susan Skylark]

A falb fee is just a wild/pharaoh type bird with one or two copies of the fee gene, which makes the red/brown gray scale. In Italian/fawn it makes the bird white with black spots (called pearl) and in Rosetta/EB it makes a usually brownish bird gray or even almost black (called Grau or Grau fee). Homozygous birds tend to be more black/white/gray than heterozygous birds. Then you toss in the roux gene which makes the blacks red and it really gets interesting: I’ve got an Italian base bird that is overall white so a pearl or fee carrier but also all the spots and stripes are red meaning it Carries roux too. It might also be tuxedo (white breast so can’t easily feather sex with breast spots) but in an Italian the male often has a chestnut head (except fee and roux are in there messing that up!). I thought it was male with the red stripes and limited spots but now see some light spotting and a double stripe even if it is red (roux!) so female? Then you throw in pansy, sparkly, silver…and it really gets confusing! But you can get some cool birds!