Found this rather pointy egg in the nest box alongside normal looking chicken eggs. For a moment, I thought it might be a guinea egg but when I cracked it, the shell was fairly thin like a chicken egg. As far as I know, guinea eggs are supposed to be thick-shelled. It also was slightly thick and wrinkled at the pointy end like a malformed chicken egg might be. My guineas are almost a year old and free range. I've not seen an egg out of the bunch so far but don't really expect to since they are fully free ranged birds. They even eschew their coop completely and roost in a tree at night.