I have a silkie roo crossed to both a RIR and a GLW - all of his offspring are mutts all but one got right foot 5 toes, left foot 4 toes, all the GLW are bantum sived and the RIR are LF...
Now If he had proper feathers (he doesn't) I would have to check his possible mates to make sure they give 5 toes on the left feet- then I could nearly ensure 5 toes each foot.
If I wanted to breed silkies...
I don't think you can show a four toed silkie.
So I learned from my cross:
My roo carries 4 toed gene for the right foot,
My GLW carries the gene for bantam
My roo carries black under his dominant white
My RIR gold (red) leaks on males but does not leak as much on females weather black or white base feathering. ((this surprised me I thought it would be the other way))
My roo only carries one black skin gene as I had two born with white skin.
My roo only carries one foot feather gene OR foot feather is recessive and one of the girls has it also
I guess my silkie is a silkie/sultan cross from what I see.