What comes into my mind is :
Change the flocks dynamics.
1
Divide the flock in two. That is separate the 2 bullies and Lavender. Maybe you could buy a second coop (or keep them in a barn/ buy a second hand play house) where you can keep them in for several weeks and let them free range a few hours a day.
After a couple of weeks / a month you can try to add Lavender back into the main flock again. If she pecks on Penny again you need to keep her separated from the friendly flock with Penny a few weeks longer. If it goes well, wait another 2-4 weeks and try to switch one bully with two neutral chickens for a week or two. And finally put them all together again.
Give them all access to a sand bath and grit on the side. Check on lice.
Maybe some of the chickens are traumatised because the grew up in miserable circumstances? Bad behaviour and acting scared are two sides of the spectrum. If you bought the chickens as adults are it’s not obvious they all will get together in harmony in the future. But it’s worth a try.
2
Alternative way to go: Buy an older and friendly rooster. Some of them are great in flock management. Or sell the bullies to someone who is starting to keep chickens and only wants 3.
I do have more questions:
How old were the chickens when you bought them?
What kind of person did you buy the chickens from?
Do all of you’re chickens lay eggs?
Do you have a pic of the bullies as wel?
Change the flocks dynamics.
1
Divide the flock in two. That is separate the 2 bullies and Lavender. Maybe you could buy a second coop (or keep them in a barn/ buy a second hand play house) where you can keep them in for several weeks and let them free range a few hours a day.
After a couple of weeks / a month you can try to add Lavender back into the main flock again. If she pecks on Penny again you need to keep her separated from the friendly flock with Penny a few weeks longer. If it goes well, wait another 2-4 weeks and try to switch one bully with two neutral chickens for a week or two. And finally put them all together again.
Give them all access to a sand bath and grit on the side. Check on lice.
Maybe some of the chickens are traumatised because the grew up in miserable circumstances? Bad behaviour and acting scared are two sides of the spectrum. If you bought the chickens as adults are it’s not obvious they all will get together in harmony in the future. But it’s worth a try.
2
Alternative way to go: Buy an older and friendly rooster. Some of them are great in flock management. Or sell the bullies to someone who is starting to keep chickens and only wants 3.
I do have more questions:
How old were the chickens when you bought them?
What kind of person did you buy the chickens from?
Do all of you’re chickens lay eggs?
Do you have a pic of the bullies as wel?