I need help with sick chicks..... SO purchased Ameracauna's from organic farmer 2 weeks ago so they are now 5 weeks old. They all developed what I thought was avian pox last week with lesions on comb,eyes and legs, but three days ago one chick developed imbalance and what looks like paralysis laying on side. We have dropper fed, and she is still alive. Now two others have developed symptoms. Unsure what it is.... any advice??? is it Marcks disease??