Used to have four guineas in a coop with ten chickens, including one rooster. After weeks and weeks of the alpha male attacking the RIR hens (no others, just the red ones) and then turning on my rooster, chasing him into the woods twice, I rehomed them. Guineas do better in large groups, some have found. They do better in their separate society, too. They're nothing like chickens and when they attack, they tag team their victims, hitting them from all sides, something chickens don't do and have no real defense against. It's not always a good situation with chickens and guineas together.
Mine were in the coop with the chickens from the time they were 4 weeks old, but when mating age approached, that's when the trouble began.
Mine were in the coop with the chickens from the time they were 4 weeks old, but when mating age approached, that's when the trouble began.