My Munchkin is the same, she used to love RC kibble. Then all of a sudden, she didn't like it anymore. I tried to switch her to Canidae, but she still won't eat it unless it has Cesars. But she'll just like it off the kibble.
I'll try some of the homemade recipes on her and mix it in with her kibble.
I tried to feed her before with something homemade, but the beef was uncooked.. she devoured it, but it gave her allergies. so i'll try something homemade but cooked this time.