One by itself wouldn't be happy; they are sociable & like to be around others of their kind. Three is the minimum I would keep. Mine go into the coop with the chickens at night & first thing when I let them out in the morning, fly over the six foot run fence & roam the property all day long, going back in w/the chickens at sundown. They stay pretty much in the back, which is good as we have a highway in front. They are very nosy & have to be in the middle of anything going on -- and talk about it, too. Here they are perched on the gate just in back of the house -- they like to watch me through my kitchen window when I'm doing dishes.The three cabelleros!! That's a riot! I never would have thought of including guineas for that purpose. I don't have a very big run - 4' x 8' with 5 bantam silkies. Do you think 1 guinea would fit? I let the free range when I'm out. Will let them out more when they are older. Would it be lonely being the only guinea?
Thanks so much for the advice.