I have 3 lavender hens. Used to have a lavender cock, but had to give him the death sentence after he pecked my boy in the face. Hadn't yet learned to process, or I would have brought him to the table. Instead, I buried his carcass deep, along with the dozen guinea eggs I'd been having a hen incubate. I wanted both him & all his DNA gone for good.
But a neighbor did hatch at least one keet from our guinea eggs, so it seems the lavenders can reproduce on their own. That cock bird kept himself & his hens busy while he lived.
Now the hens roam the yard during the day & put themselves to roost in the pole barn at night. They lay for several months each year in a communal nest, and then one of them decides to go broody on them. We are alert for the special sound they make on the nest, find their hiding place, and steal out the new eggs daily (I leave a few marked eggs there to hold their place). They are hard to crack, but their taste is worth the effort. When a hen starts to brood I'll take her off the nest each night in hopes she'll give up. But often I'll have to cover up that nest site, and then they all decide on a new one.
We find them endearing & amusing, but LOUD. Once we saw a nature program on TV showing a herd of huge hippopotomus who dominated a river bank in Africa. They wouldn't move for crocodiles, hyenas, or even lions. But when a flock of guineas came for water, making their familiar call, all the hippos sprang to their feet and ran into the river.
Some folks say that guineas call "buck-WHEAT buck-WHEAT" but my boys claim that our guineas are saying "butt-CRAAK! butt-CRAACK!"