Ah, sorry for my long absence. My guineas attack Pastel all the time whenever I let him peck around outside.
Today a huge fight broke our between them. Guineas have very big personalities for their small size. They think that they can take something even twice their size on.
Guineas are actually known to kill roosters. I honestly don't know that much about how or why they do, but I'd try to separate them. If not then you may need to re-home the trouble making guineas.
I've seen YT videos about how chickens would hide from guineas, and once the guineas were rehomed, the chickens were fine.
It's quite interesting. I'm not so sure though.
I am trying to re-home some of my guineas, as my dad said that I can get some more chickens if I do

I'm gonna find the weekly synopsis now, and I have tons to catch up on.
Hope all is well!!