Please help I have a 7 month old hen who has not started laying yet but should be soon as her sister has. She has suddenly been moving very slow I pick her up and she is very thin. I don't know what could be wrong with her. I have them on Corid in case it is coccidiosis. I do have them on Wormguard Plus I mix with their food. She eating but very little walks very slowly and will not pearch at night anymore just lays on the floor. Her vent is clear. I have tried everything I can think of I have sprayed her with poultry protector for mites but I am worried, any advice someone can give me would be appreciated.