I started this project last year after reading up a little on the ISA Browns. I know I can't produce the "TRUE" ISA Browns but this looks like a good project. I ordered about 16 RIW hens, 30 RIR hens along with 5 roos from ea breed last year. The laying habits of the two breeds are as follows: Out of 16 RIW hens I gather average of 14 eggs/day Out of 30 RIR hens I gather 26 eggs/day average. I plan to cross the RIR rooster with the RIW hens. Both breeds seem to be great layers and i'm hoping this will give me a good sex-link. Anyone else done this?