My 3 domoniques are 16 weeks old today and are not laying yet. With my 6 white leghorns it was easy to watch their combs grow and turned BRIGHT red when they were ready to start laying. The domoniques show very little comb in comparison. What should the comb look like as they approach laying age?? Should they use the same laying boxes as the white leghorns? Are they going to fight each other over the 3 nests? How much longer before they should start laying?