My 27 week old rir hen has not started laying she is not squatting her comb and wattles are underdeveloped and are not even pink.She is smaller than the others and they are all laying. What is wrong with her? Thank you for any ideas. She is eating and drinking, her stools are mostly liquid. She is not as active as the others. Please help she is so sweet. Could she just be a late bloomer or is something wrong? Has anyone had this problem?