Hi, I think you have been given a lot of good suggestions. I would definitely focus on separating and building a bigger coop. I know the Eglu you got said it was rated for up to 5 chickens, but I wouldn't put more than two in it. Perfect for separating a sick chicken, a mean girl or letting a broody hatch her chicks but not for the whole flock to share.
I would build a coop that is at least 4x6. bigger would be better especially if you will be getting more chickens. I know everyone says one nest box should be fine for four hens but since they already are being territorial about it I would build 2 or 3. Make sure you have good ventilation and roosting space. Take a look at the coop forums for good guidelines.
Also just wanted to say that I think your white chicken is an Amber Link/Amber Star, it's the opposite coloring of a Red Star/Golden Comet. The mother would have been a red hen (Rhode Island, New Hampshire or Production Red) and the father a white rooster with the silver gene such as Rhode Island White. It's the opposite parenting for the reds. I agree that your black hen is probably a Cochin or a Cochin mix. You know the Buff Orpington, but I have no idea what your brown and black one is, she has a very long tail, almost looks like a game bird.
Best of luck!
I would build a coop that is at least 4x6. bigger would be better especially if you will be getting more chickens. I know everyone says one nest box should be fine for four hens but since they already are being territorial about it I would build 2 or 3. Make sure you have good ventilation and roosting space. Take a look at the coop forums for good guidelines.
Also just wanted to say that I think your white chicken is an Amber Link/Amber Star, it's the opposite coloring of a Red Star/Golden Comet. The mother would have been a red hen (Rhode Island, New Hampshire or Production Red) and the father a white rooster with the silver gene such as Rhode Island White. It's the opposite parenting for the reds. I agree that your black hen is probably a Cochin or a Cochin mix. You know the Buff Orpington, but I have no idea what your brown and black one is, she has a very long tail, almost looks like a game bird.
Best of luck!