Guineas- What the hell!!

[PoppasGrill]

We’ve got 2 Guineas that were raised with 14 pullets. For some reason the Guineas have started rushing into the middle of their clutch mates , and the other hens, and chasing them aggressively.
Tried separating them in their own coop, but as soon as we let them out to free range they go back into the other coops and terrorize the hens, even ganging up on the roosters.

 

[JacinLarkwell]

We’ve got 2 Guineas that were raised with 14 pullets. For some reason the Guineas have started rushing into the middle of their clutch mates , and the other hens, and chasing them aggressively.
Tried separating them in their own coop, but as soon as we let them out to free range they go back into the other coops and terrorize the hens, even ganging up on the roosters.

They imprinted on the chickens and see them as other guineas. That's why it's recommended to raise and brood separately

 

[SamLockwood]

Absent any real details it's hard to say.

First, guineas tend to like being in larger groups and tend to get very tetchy if they're alone or in small groups. If you have a proper flock of guineas and one gets separated from the group they often go into full panic mode.

Second, guineas are naturally more aggressive than chickens and have zero subtlety when it comes to enforcing the pecking order or trying to establish themselves. The males are really bad when their hormones first kick in. Even when they're mature it's inevitable that I'll have a pair of boys that will spend hours every day chasing each other around.

Third, guineas are extremely territorial. When you have a new flock they'll start freaking out about everything around six months of age: if it's bigger than them they'll run away from it, and if it's smaller they'll attack it. Mine were raised with chickens and never really treated them any worse than they treated each other, but they went through a three month phase of screaming their heads off at EVERYTHING and they attacked anything that dared wander into their territory: wild birds, rabbits, squirrels, they'd even charge deer that came near the fence. They terrorized my mothers cat for solid month.

After a while they calmed down, except for the deer thing. They still chase them off but I think it's more for the entertainment value of bullying a much larger animal.

I'd either re-home them or get a couple more pairs and see if your two calm down.