I had a total of 5 black silkies at 5 weeks old all doing well. They were in with other chicks including turkey guinea fowl and a few others, they all were getting on fine and all eating and drinking well. The roof of the pen has mesh area to allow a good supply of air it also has a window which has been open. Last night it rained very hard and the pen had a large puddle of water. 3 of the silkies this morning were dead and had gone stiff so had been dead for sometime although they were fine last night. I have 2 thoughts in my mind. 1 a predator had gone through the window and killed the 3, (why it didn't kill any others and why it only killed the black ones i don't know). 2 the puddle in the pen got them wet and they became weak and died (why the 3 black silkies got wet and none of the others i don't know as this morning they seemed to enjoy wading through the water) They are the only 2 reasons i could think of to what may have caused them to die. They were spread out around the pen which also raises questions If anyone can be of any help then please comment.