Would the board please give me some input on this illness? I am thinking Mareks. But will bow to the boards input. My birds were not vaccinated as chicks. 3rd bird to come down with this illness. First was 60 days ago. A hen that is a year old. Then a Cockerel last month. They died after a week. Pullet age 5 months average weight 5lbs Cannot remain standing. Wobbly, then sits. Falls over on her head and very unbalanced. Comb is not bright red, little pale. Clucks when I'm with her. Droppings are soft to runny. Light milk chocolate in color. Smells normal. Eats and drinks okay. Housed in nice coop I clean monthly. New shavings when I do. DE on a regular bases. No lice found. Housed with 16 other chickens. First Hen died while I was out of town, so I dont know her story. Second bird, the cockerel, I thought might be Cocci, so I treated him as such. He didnt make it. This bird I have quarantined and have been giving terrimycin Agri-biotic for two days. I dont see any improvement, but not worsening either. Huge amounts of rain in last 60 days. There are puddles that collect runoff water that is dirty in my opinion. I am sure thay all sip from them. No wounds, sores tumors or anything I else I can find. No local vets here that I have found. Ideas?