I have only 15 chickens - mixture - 5 Rhode Island Red, 3 black and white ones (you can tell I am knew at this lol), one white hen - Leg Horn and 3 blonde looking ones all two years - and then 3 not even a year old yet. ALL hens but one of the young ones. The young ones are not laying yet. Anyway here is my issues: 1) they all but the new ones have red butts and have had them all summer; At least half of them have other feathers missing back by their vents. They look sick but I have not been able to see any mites, lice or other crawing critters. I also put down twice red lake earth powder in the coop, nest, and pen. 2)I have been finding at least one egg every other day in their nest that is broke open - not eaten just open. 3) I came home at noon and one of the blonde hens was not moving very well and some of the red ones (2 in particular) were picking on her so I separated her from the other ones. The next morning she was dead right where I left her. 4) What do I do with the two red hens that pick on everyone? They are bullies and I don't care for them at all. thanks for any advise!!!!