I may be wrong about them. I found some pics I took of my Blue Salmon Fav Bantams. I believe these are both roosters, if I remember right. A bit younger than yours, but maybe this helps?
This is a pullet.
Pullets grown up a bit in front, rooster in back:
I don't see any Salmon Faverolles. I see one Blue and the others are mixed colors. Could they be Salmon X Blue? Judging from the combs, I'd be afraid they are all roosters.