Guineas do lay eggs. Guinea hens are seasonal layers. They typically will not lay eggs through winter.
The first 3 years of a guinea hen’s life are usually the most productive. During this period, she would lay an egg almost every day when in laying season. But as she gets older, this laying rate would fall.
A suitable laying spot for a guinea is usually filled with long grass or any other landscape feature that can hide the eggs.
The average guinea egg is about half the size of a duck egg or a large chicken egg. The pointed end of guinea eggs is also pointier than what you would typically see in chicken or duck eggs.
Yes, guinea eggs are totally edible. Their taste is quite similar to that of chicken eggs, but they have more yolk. Guinea eggs can be prepared in pretty much the same way as chicken eggs and duck eggs.