My mum wanted some guineas, so I bought her two females (well, one of them was a female I know) that were quite young at the time. One of them died the night we got it because of the cold (and the youngness), but our friend gave us a grown male one of hers. We added them to our existing flock of chickens (8 hens, 1 possibly-hen, 2 roosters), and kept them all locked together for 2 weeks. I've read that you should lock them up for 6 weeks, but nothing ever seems to need that long.
So anyway, the male guinea fowl seems to follow the head rooster everywhere, and the young female guinea fowl follows the male guinea arround (though the male must get cranky at her, cause I've seen him chasing her, getting quite aggressive). They all tagged along with the chickens and only flew up on the roof when I, or the dogs scared them, or got to close to them. They always flew down after a few minutes though.
They can be randomly noisy, but I'm used to it. The male makes an extremely loud noise when we are trying to shepard the chickens, and he will often make this same noise for no reason when in with the chooks. The female sometimes makes this noise, but is a lot quieter.
We're going to get two more soon, so I'm quite excited; I've read that it's best to have at least three, though I suppose this would be different if there were chickens that they can companion with. The male has never had any problem with our rooster... something which possibly
could change in the future... but nothing I think will happen.
We just feed them the same as what we feed the chooks.
They're happy as Larry!

I would recommend them to you, if you can put up with the noise
