Our Black hen has always been very slow and so when she died I wasn't supprised. Now this morning my son went out to feed the birds and came in to tell me that Denise, my crooked toe hen, was dead also. No one seems sick, poo looks ok, feeding fine, fresh water. They all stopped laying and are molting I believe. Our weather has been very nasty, rainy and cold. Any suggestions on how to keep the rest from dying?