We got our first chicks on April 16th. We were told they were 6 weeks old. 1 Gold Laced Cochin, 1 Silver Grey Dorking and 1 Welsummer. (We can only have 3 in our downtown neighborhood) The Cochin started laying at about 23 weeks. She is doing GREAT! The Dorking laid her first egg at 26 weeks on September 3rd. She has since laid 2 good eggs and the rest either soft or no shell. The Welsummer has not laid any eggs to date. They are all on layer feed and have oyster shell. Any advice or suggestions???