Howdy! I suspect one of my hen's has the ocular strain of Marek's disease. She has been exhibiting signs of blindness for the last two weeks, and her pupils and irises are extremely not normal. My question is do I cull her or let her be? I have a new shipment of chicks coming today who unfortunately were NOT vaccinated. None of the rest of my adults show symptoms, but I really don't want to lose my entire flock plus all of my new babies.