I've been blogging each week with photos of my 7 chicks as they grow so I can see the weekly differences. The chicks are now 5+ weeks old and I thought I had 5 hens & 2 roos however my absolute safest bet for a hen seems to be growing some spurs. They are still small but I'm wondering if hens have small spurs. All the chicks seem to have a small bump on their legs. http://backyardchickenfever.blogspot.com/2011/05/just-when-you-got-it-all-figured-out.html At what age can I expect those spurs to really begin to get obvious? Thanks!