I have a hen the mates and lays eggs but the eggs seem unfertilized. The rooster I have mates with other hens and the eggs develop. This hen is a black Spanish game hen imported from Puerto Rico and is one year old. Does anyone have any suggestions?
Welcome to BYC Have you checked the eggs for fertility, or tried incubating them? It is possible that the hen is expelling the rooster's sperm after mating, therefor preventing her eggs from being fertilised (I have actually seen a hen do this once). You can check for fertility by cracking the eggs on a plate and checking the yolk, some examples here: https://www.backyardchickens.com/t/16008/how-to-tell-a-fertile-vs-infertile-egg-pictures/0_30