I agree with hcammack about preditors from the sky. We have a lot of hawks and when they fly over the chickens all run for cover, the guineas will just stand there in plain sight and scream "come-GET-me, come-GET-me" I have lost only a couple of chickens to hawks overall but probably more than 1/2 of the guineas I would let free range until I started penning them with the juvenile chicks. It seems that young chicks and guineas who think they are chickens will copy the older birds more.
Its amazing though, I have seen my 5 oldest guineas advance on a red fox and chase him away. I have also been standing right beside the coop in plain view of the hawk while he went after my guineas. The hawks are definitely more aggressive when they have young in the nest, so this spring I won't be allowing any young birds to free range unless at least I can stay outside with them.
Margaret
Its amazing though, I have seen my 5 oldest guineas advance on a red fox and chase him away. I have also been standing right beside the coop in plain view of the hawk while he went after my guineas. The hawks are definitely more aggressive when they have young in the nest, so this spring I won't be allowing any young birds to free range unless at least I can stay outside with them.
Margaret