I shut my guineas in the coop every night and have not lost a guinea in all the years that I have been doing this. I do not allow any of the hens to sit out at night on a hidden nest.If they go to coop at night, you might have two by fall.
Before I put my guineas in a coop at night, I lost every single one of them to Great Horned Owls.
I have not lost any of my Coral Blues, Lavender, Powder Blue, Sky Blue or White guineas to predators. I did lose all of my Pearl Gray guineas to predators.the lighter colored ones are the best targets for predators. whites, grays, blues..