I had this problem with captain. Bettas are picky eaters so it can be a pain. I had to crush his pellets into powder before he would eat them. I still have to. They like a variety of foods though so maybe she doesn't like them. Sometimes you just have to give it time though. Some people suggest that it takes them a while to recognize certain things as food. I feed mine bloodworms, tropical fish flakes and pellets in rotation.