IMO, 9 weeks old is kind of young for them to be outside on their own already, especially at night during the worst predator time of the year. They might be scared, and just huddle together on the ground thinking they are safe. Guineas have to be worked with and they have to be taught/trained to come back to the coop at night.
I suggest catching them (at night like Zaz mentioned), putting them back in their coop for a few more weeks and providing roosts of different heights in there with them so they learn to roost high. Then work with them about going in at night once you do start letting them out again. Predators will just keep coming back, so you will need to make the keets unaccessable to them in order to prevent further loss.
Being the French variety of Guinea Fowl should not make any difference in their ability to fly (bigger body, bigger wings)... maybe the breeder pinioned their wings as keets and they can't get any lift when they attempt to fly? I do see white feathers on one that are in the normal place that flight feathers are located tho...
I suggest catching them (at night like Zaz mentioned), putting them back in their coop for a few more weeks and providing roosts of different heights in there with them so they learn to roost high. Then work with them about going in at night once you do start letting them out again. Predators will just keep coming back, so you will need to make the keets unaccessable to them in order to prevent further loss.
Being the French variety of Guinea Fowl should not make any difference in their ability to fly (bigger body, bigger wings)... maybe the breeder pinioned their wings as keets and they can't get any lift when they attempt to fly? I do see white feathers on one that are in the normal place that flight feathers are located tho...