as what others have said. most harvested birds you see are probably 2 years old. however, the area you hunt "terrain, genetics, stress, etc." probably play a big role in it. I see so many people post 1.5" spurs on facebook its unreal...ive never killed one, nor has there been one killed with spurs like that on any of the private land I hunt which is rough terrain. We kill some with better than 1" , but anything over 1.25 is very rare. seems like most birds that aren't blatant 2 year olds rarely have more than 1 1/8 spurs. this is just where I hunt. I know plenty of people who have killed big hooked birds, and I have as well but not in my neck of the woods.