I have a Mottled Houdan hen that is about 1.5 years old. She's always been healthy and always laid well. About 2 weeks ago, I noticed she was suddenly being picked on by my flock (5 hens total). She has always been low-man on the totem pole so I assumed she had commited some chicken crime. Normally, this kind of thing goes on for a day or two and then peace is restored but I noticed that she kept getting picked on and picked on. Around this same time, she stopped laying. She laid an egg with a soft shell one day and then I haven't seen anything since. She has also started to moult, so I didn't think too much of it. Her neck, face, and undersides are nearly bald and covered in 'sticks' for new feathers. About 5 days ago, I noticed she looked 'droopy.' She had some poop on her butt too. I isolated her beginning 3 days ago, provided her own food and water as well as extras that she usually likes. She hasn't been eating with much gusto -- just picking here and there. Yesterday, I pulled her out, cleaned her up (the poop), checked her skin for parasites (none), wormed her, and squirted about 1 tsp of buttermilk down her throat. She seemed marginally improved for the rest of the afternoon & evening (she ate some, sipped more buttermilk on her own). This morning, she's back to being depressed. I'm concerned because she seems to be dropping more weight. She was never a big chicken to begin with but now she feels much lighter. The other hens (another is also a Houdan) are all looking strong and healthy (even the ones that have started to moult). Ideas? I don't want to lose her.