I have babies that I am keeping from a rescue rat litter and I also have other adult rats. I am interested in buying a harland formula that will meet the needs for both. What would you suggest? My adults are still young, about 5 months old. I do supplement meats and other proteins 3 times a week along with salads, nuts, seeds, and other delicious stuff I can find at petstores. What protein percentage would you recommend?