Those guineas are so loud I don't know what good they are except as a watch dog. I've heard they're not good to eat. Have you ever tasted one?
Guineas are considered a delicacy to eat. It has been many years since I have had guinea to eat and as far as I can remember, it was very good.
Because guineas can set themselves off for reasons only they may or may not know, they aren't really very good as watch dogs. They are reported to be excellent for tick control and can be hilarious to watch while chasing after grasshoppers.