He's had this issue pretty much since I ought them almost. Year ago but come to think of it I don't think I had one pure rir till recently long after joe my other roo was sold... I've had five chicks pure rir hatch one by a broody four by incubator only three survived out of 60 eggs.. I'm almost certain it's Henry that has fertility issues I had nearly 100% hatch rate when joe was here
Thats the best thing to do. Watch what eggs come from what hen, and who the rooster is breeding with. Henry may have fertility problems. Keep in mind though, heritage roosters breed less in the fall and the hens lay less also.