I lost two silkies last night due to cold- one was already going to rigor mortis in the am and put him down. I think silkies are tough because their breeding is genuinely not practical for more rustic areas. They were fine last night but two this morning was disappointing- they are slow and clumsy and the cold and humidity got them even though it was deceptive- I think its hard to spot the sick before they go because of that- I know I've heard birds tend to hide their illness until too late- make sense with such a docile breed that has so much fluff you can't tell what's happening- first time with chickens so disappointed but still have two left- going to steer clear of the breed because how endearing they are makes it hard to not consider them pets in case something happens.