hi just wondering if anyone could shed some light on this. we have ten RIR pullets and eight WLH pullets in the same coop, All are seven months old ,and have been laying eggs now for two + months. found one of the WLHs sitting on the coop floor sunday ,she can't stand or walk ,yesterday (tuesday) three more of the WLHs are limping. RIRs don't show any signs of trouble. Anyone have any ideals what could be wrong or how to treat this? all are eating and drinking and very aleart Thanks.