I have 15 hens and 1 eight month old rooster. The rooster continually mounts the hens and some of the hens are starting to show bare backs (no feathers). I like my rooster and want him to fertilize the eggs for chick production. I know that the mounting is part of the fertilization process. Is it feasible to separate the rooster most of the day to give the hens a rest? As he matures will he become less aggressive?