Get chickens and guineas at the same time as chicks. They grow up together and wont pick on the chickens. Actually they are great at watching for predators, both ground and sky based. We have had them for 2 years now and they go into a chicken tractor every night at sundown. On day they had a stray dog that was looking for an easy chicken dinner pinned into our fenced garden. The dog was afraid of the guineas, and they wouldn't let him out through the section of fence we open in the fall. I had to shew the guineas away and chase off the dog, which high tailed it out as i sent a couple of shotshells over him as he ran down the hill. I figured if he came back he was curtains.
The guineas eat sunflower seeds from my hand, but wont let us pet them. Which is fine, as they have other jobs to do. As a matter of fact, we should have a few new guineas as we have a couple of broody hens right now, and fertile guinea eggs. They are also not annoying, if they cackle, it is because something distresses them. And not blowing leaves either. Good luck with the quest, perhaps you could persuade her to try them.
Lnk