HI !!!! i have three red sussex hens and they were supposed to start laying last month and one did but the other two still havent!!!!! one is really skinny for some reason and seems a bit slow but he is all happy and normal and the other chicken is really big compared to my skinny chicken (named fang) but her comb is still tiny. why arent they laying !!!!!!!! oh and its starting to get cold and there is less daylight. Any suggestions why they are not laying yet?