we have 3 rir and l welsummers, rir is 9 months old, and welsummer, older, not sure age. We want to add to out flock only for eggs to sell, so am looking for great egg layers, and for them to be compatible. What type of chicken would you suggest. Our rir just starting to lay. We have 4 hens, and are getting 13 eggs a week, so am not even sure if all my hens are laying. Opionions.