That is reassuring hearing that your breeds are mixed together. Are they all in a large pen together or are they open yard ranged? Are they still in the pullet stage or are they matured adults? Are they all mixed with roos or do you have just hens together? I hesitated considering a Coronation Sussex hen - even though reportedly a mellow breed - because Sussex are so big reaching up to 7+ lbs and Silkies are roughly only 2 lbs. If a Sussex decided to push her weight around I feared the Silkies would get the short end of the stick, especially since we've already re-homed 3 LF breeds too aggressive for Silkies. That's why I'm trying to get as much input as I can about SFH females before adding one to our little flock. Breed temperament is our primary focus with production not as important. I mean chickens will be chickens and there will always be an alpha hen when there's no roo but we definitely don't want the more assertive natures of general dual-purpose LFs. From experience we've eliminated the RIRs, BRs, Marans, NHRs, and Legs including all of the Mediterranean class too. From our friend's experience we have eliminated Orps, OEs (Marans based), Javas, Red Sexlinks, and Leg hybrids. Some ppl experienced sporadic incidences with Wyans so we decided not to risk such a large hen with smaller lightweight gentles. I personally adore the smaller Dominique LF yet have been advised they may be too spunky with Silkies. My Ameraucana will flee to avoid conflict and the little Breda pretty much stays out of everyone's face, but sometimes my Silkies don't back down from a challenge and obviously will get throttled if a LF is too aggressive towards them. I'm trying to keep flock additions with gentle temperaments at approx 5-lbs-or-under. SFH owners have given me some nice feedback. Sometimes the pullets of any breed are mellow but when they reach maturity anywhere from 18 months to 3 years they start employing their aggressive behavior. So far we haven't seen aggressive tendencies in the Silkie, Ameraucana, or Breda and our friends have had extremely good EE adult hens. I know Araucana, Brahma, Cochin, Crevecoeur, Dorking, Faverolles, Houdan, Pavlovskaja, Polish, Russian Orloff, and Sultans are reportedly gentle or docile but I was trying to get away from any more crested, bearded, muffed, feather-footed, vulture-hocked, 5-toed breeds and just get one "normal" looking non-assertive chicken breed - LOL. Thank you so much for your generous and kind input!