Chicken hearts are quite nutritious, and at this point in time she does need a lot of nutrients. I'm not sure what the recommended amount of hearts per day is, though. On top of the chicken hearts she will also need a good kitten food, or a nutritious adult food. Unless you are already feeding your own raw recipe or using premade raw.
Thank you very much for the info Merlin! yes we have good quality dry cat food else than the chicken hearts and livers
good enough nutritious for her right?