My silkie hatched out 5 last fall and it was cold here then,she done very well keeping them warm.I would not give her anymore then 6.I`m so excited for you,I have been waiting for one of my silkies to go broody.I have a question, should you attempt putting chicks under a first time broody or should you wait untill she has hatched out eggs and learned how to be a mama.My broody that hatched out the eggs died a few weeks ago so it would be one of her chicks that will go broody.She is 5 months old so I don`t expect her to go broody until spring or early summer.