I have heavy breed chickens, 4 guineas, 2 banties and a silkie. The two banties, one hen one roo are in a separate pin and are never out. The rest free range. Today when we collected eggs there was a very small egg about an inch long. I have no clue where it came from. I haven't had guineas before so I don't know what their eggs look like. Would one of my big hens have laid an egg that size for some reason or another? The silkie is a roo. I've had chickens for 5 years now and I've never gotten an egg like this.