One summer I had six guineas. They started laying eggs in the dog house. It was a nice little house with an abundance of straw for them to make their nest(s) in. I didn't know they were laying in the doghouse until one day I just happened to notice three of them in there setting. Since it was summer the dogs weren't using it. I just left them alone. Before long another started setting with them. That made it four of the six setting on eggs. Later the fifth was setting and after about two weeks the sixth was in there setting. That told me one thing. I didn't have any guinea roosters so they were wasting their time. I booted them out and put a piece of chicken wire over the door so they couldn't get in. I sifted through the straw and collected all the eggs. I filled a five gallon bucket up to within three inches of the top. I was very careful not to break any eggs because there were probably some pretty nasty ones in the bunch. It was a lot of eggs! The only way that I know of to tell the sex of a guinea is by the noise it does or doesn't make. A guinea hen makes a sound that the rooster doesn't. Just because you haven't heard one make the hen sound doesn't necessarily mean it is a rooster. It just means you haven't heard it. I have tried many different methods and suggestions for determining the sex but haven't found one that works. Anyone have a method? I would hate for my guinea hens to waste their time again. You would think at least one in six would be a rooster.