Five-month-old Buff Orphington hen. Has not developed comb or wattles and is a little undersized compared to other two from same hatch. Has an area of hardened poop on her bottom. I have bathed in Epsom salts and tried to wipe it off, but it is very hard. Have had to use a q-tip the past couple of days to be sure vent is clear. I have cut away the features to help keep it dry and clean. The smell is pretty bad just from one day to next when she gets a bath. She cries a little when she tries to poop. We have given Epsom salt drench, have put garlic in her water, Epsom salt in her water, used a little olive oil on the vent to try to keep it soft and open. Otherwise, she is eating and drinking well. Has always been a little bit timid, so her demeanor has not changed. Going to worm her today and use Tetracycline on the advice of an experienced chicken momma I know. Any other thoughts or ideas?? Thanks in advance...hate to lose her, but don't want her to suffer if she can't be saved.