only spur problem I had was a hatchery Barred Rook HEN! In her old age she developed spurs and they curled around into her foot. I didn't notice until she was limping one day and I used a cat nail clipper. They were much smaller than roosters. She was about 4 when she developed them, almost 6 when she quit laying and they were a problem. Went down hill when she was 7, Just laying on her side , couldn't walk and I gave her mercy. 
