I have a Pearl White Leghorn that I ordered From Murry McMurry as a 4 to 9 week old started chick. I received my chicks the first week in May so assuming they were 4 weeks old at that point would put her at 25 to 26 weeks old now. All my other hens have been laying for a while now except the leghorn. They are all fed All Flock with free choice oyster shell on the side.She has huge a bright red comb and waddles. She also has been squatting when we go to pet her for a couple of weeks now. She shows some interest in the nesting boxes and goes in and out of them but does not sit in them. I've read of leghorns starting to lay as soon as 16 weeks so at 26 weeks I am starting to wonder whats going on. She seems to be very happy and healthy and gets along with the rest of the flock just fine.