Keeping the eggs fertile seems to the main reason, so if you use the ratio that hatcheries use, about one rooster for every ten hens is what you should aim for. I would monitor how fertile the eggs are and adjust as necessary. You could also keep fewer. As the time you want to hatch approaches, confine ten hens with the rooster you like to make sure those eggs are fertile.
All chicks pullet or cockerel will "mock" fight to establish the pecking order, the pullets just do it less. There are always those that don't develop as early as a month and can take much longer to show themselves and so can fool even an experienced eye.
All chicks pullet or cockerel will "mock" fight to establish the pecking order, the pullets just do it less. There are always those that don't develop as early as a month and can take much longer to show themselves and so can fool even an experienced eye.