Maine Coons are slow growing cats and the kittens need to be on kitten food till age 18 months to 2 years old.  ​We feed all our Maine Coons Good Friends Natural hard and can food.  ​It's great for kittens and adults.  I do send home with all of our cats food to help transition them at their new homes.  If you would like to continue what we feed them you can purchase it at Rural King.