help only got chickens yesterday for first time they were all fine yesterday but the Barnevelder is sick today wont eat or drink and seems to just want to sleep all day but if a gone near her she runs off have her seperate from others but dosent seem to have other symptoms her poo a little runny but not too bad ,no discharge from eyes,nose or mouth cant find any lice ,eyes bright but just stands and closes eyes tried treats but wont eat help,