We have one silkie with 15 other chickens, most LF. She holds her own and knows which ones to stay away from (peckers). No one picks on her but there is a pecking order at the feeder and she knows to come back when the BO is done...unless of her buddies sticks up for her.
They all free range and she manages to roll with the flock. She gets in on treats and always goes to the same spot in the coop...she sleeps in a covered tub on the floor...and actually as it got cold one of the brahmas left the roost to sleep with her.
They are more limited because of their fuzzy faces blocking their vision and inability to fly. I was shocked today to see she had somehow got on top of the picnic bench with the other chickens...I've never seen her get much air.
Ours is a sweetie and did grow up with these guys since days old so she may be more used to regular flock stuff.