I'll let you keep you guineas, Cyn! Terrible experience here, too. Mine were even hatched by one of my friendliest broody hens! After she left them, my Willie Roo became their "Papa Willie." They LOVED him but became monsters to the rest of the flock, tearing out tail feathers, leaving the youngsters bloody. They then decided the tree would be a better roosting place. There was no taming these, even though they had been handled and socialized from hatch. Some got picked off by predators. The remaining 3 were rehomed. DH was never happier to see something leave the farm. No more constant dying turkeyduck sounds ALL DAY LONG.
More power to you if you can handle them
(I also had some nasty hens who liked to pick Willie's saddle and hackle feathers, GRR)
More power to you if you can handle them

(I also had some nasty hens who liked to pick Willie's saddle and hackle feathers, GRR)