What is a Guinea's natural life span? Was reading some of the post about Guineas not being so smart but very entertaining, I have to agree, not sure of my Guineas or Turkeys who would win the stupid award more. I had 13 Guineas and thanks to my neighbor's son driving 100 miles down a 30 mile farm road has wiped out 6 of them this past year. I don't pen mine up they go in a large oak tree at night and I have had them about 6 years (not all are 6 years old but two are) I let them free range for several reasons 1) they are an excellent alarm system, even at night (did not realize they were blind at night) they have several time let me know when a fox, racoons or coyotes were around 2) I heard they did wonders on tick and snake control, have seen neither since I got the birds and 3) I just love to watch them. They can be aggressive with the chickens especially at feeding time so I don't coop them with the chickens at night. The very few times we got down to freezing weather I tried to lock them up with the chickens but it was a no go and they survived fine in the trees. I worried about them the whole night but they alerted me when the sun came up. I can't imagine not having a couple always around. They do make lousy mothers if free ranging I noted and will leave the keets at night. That is when I gather them and put them under a light.