Hello Everyone! I am almost into my first year of having hens! I have run into a few problems along my journey and am just seeking additional advice, I feel like I'm missing something, and I care about my girls so much! I'll start from the beginning of my chicken keeping. I have a 5x5 ft chicken coop, 5x18 foot covered run (with a dust bath area, roosting polls, and stumps to play on), and I leave the door open to their outdoor fenced area that it 30x30. These girls have plenty of room. I started with 5 hens. About 2 months into having the girls, I lost my first hen, Stevie my black star, our vet determined she had Mareks, I was down to four girls. In December I came home for my lunch break, went down to the girls to give them some greens and mealworms to snack on, to find my fence completely torn down and I was missing a chicken. A neighbors dog was loose and she came over, busted through my fence, and ate one of my hens. It was terrible! So here I am now down to 3 girls. I have 2 barred rocks, and one speckled sussex. The girls are on layer pellet feed, I mix in 20% protein of game bird feed (we have harsh winters here in Creede Colorado so I figured the girls need some additional goodness), they get scratch thrown out daily, black oil sunflower seeds, mealworms and black solider larve occasionally, greens, I tie up half a cabbage/lettuce head to keep them entertained, and they have a flock block. (choice of pellets and mash in the feeder, choice of oyster shell and grit and always fresh water) Now that we are down to 3, I have a major bully amongst the girls. She is the largest, one of my barred rocks and her name is Etta. She is so rude to the other girls. She is also my sweetest to humans. Etta will jump right onto your lap. And throughout this first winter she's such a good layer. Etta is currently in time out for the damage she's down to her poor sisters. She is feather pulling an INSANE amount of feathers. If one of the other girls is just in her way. She's is also eating them, I've read protein deficiency for eating feathers but how can that be with the food they are on!? I also should mention once a week I cook up eggs with ground elk meat for all of our animals (dogs/cats/chickens) so they get that additional protein too! I'm thinking about leaving her in isolation for 4 days. I know the possibility of getting rid of her is close. This is my last attempt to stop this behavior. The other girls have not taken the habit from her yet. They have been doctored with some blue kote spray while they get a break from getting pecked at. No worms, no lice I should mention too. Everyone gets looked at daily, and I do daily coop cleanings. I've done preventive deworming and DE and wood ash mixed in their dust bath area. Am I doing something wrong or have I missed a major step? I feel like I'm failing these girls but I'm not sure what else to do! Advice is greatly appreciated Thanks in advance! Here's a picture of Etta in her time out crate.