I have two newly hatched Copper Marans chicks that have "floppy necks" and what appears to be a neurological problem. They just lay in the brooder and when I pick them up their necks flop over. If I hold their beaks to the water dish - they will drink and it seems to revive them, but they are very lethargic. I have added vitamins and supplements to their water and make sure that they receive water every hour. If anyone can offer any advice on what could be the cause and a possible remedy - I would greatly appreciate your help. My little fluffy butts are too sweet not to give them every possible chance at survival.