I have a small flock of 5 silver laced wyandottes. They are about 1 year old. Things have been fine- mild temps, normal food/water/behavior. They all laid yesterday and enjoyed a mealworms treat. This morning one girl did not seem right and by this afternoon we found her dead! All other chickens seem ok. Do I need to do anything? Quarantine? Avoid the eggs? Arrange a vet visit? Please, can anyone give me some insight re what might of happened and what I should do next?????