"Do you have snakes? Guineas hate snakes and will kill any they come across. Do you have ticks? That's their favorite food. They are also known as "the farmers watch dog" because they warn you, your live stock, and each other when anything threatening is in sight." Read more here.
"The Guinea hen, presumably happily married, will begin to lay anytime from the end of March through mid-May, and will continue through the end of August, producing 60 to one hundred eggs. Lewis Wright advises setting the April and May eggs, although the guinea hen will usually not go broody until August." Read more here.
"Guineafowl are equipped with strong claws and scratch in loose soil for food much like domestic chickens, but are much less destructive in the garden as they seldom uproot growing plants." read more here.