Guinea fowl are omnivores like chickens and turkeys. They will eat most seeds, insects, arachnids, worms, fruits, grains, and so on. In the warm months, bugs are their favorites. Some people buy them to control ticks since they like to eat those. In the cold months, they mostly eat seeds and fruit. You can offer them the same things to eat as you would offer to chickens and turkeys. My chickens have three favorites - mealworms, multi-grain bread, and grapes (cut in half).
I found out a few months back that guineas can actually produce young with chickens or peafowl even though they are different species. I assume the young are sterile like mules.
Here's a link on guineas:
http://www.feathersite.com/Poultry/Guineas/BRKGuineas.htmlHere is the page on the hybrids:
http://www.feathersite.com/Poultry/Guineas...GuinHybrid.htmlYikes, some of those birds are spooky!