Super new to the world of chickens - small mixed flock - everything seemed fine in the coop.....they were settling into their new home. Only had them for two weeks....I noticed my white silkie was lethargic so I brought her into the house yesterday and within hours she was dead....????? What the heck happened??? I have no clue what I've done wrong. The rest of the girls seem fine! I cleaned out their coop as best I could - added fresh straw - cleaned their food and water containers - just want to keep the rest of them healthy - any suggestions on what else I should be doing??