All my birds free range except the ones i have just hatched out or caught them after their moms hatched them, but i never could keep the chickens off my outdoor brooders, that is why i asked.
With photos we should be able to tell you what ya got.
How to you keep your chickens away from your peas?
I have never had a problem with blackhead..knock on wood .
Do you have photos to share with us Pea brains here