This forum has a Fanconi owners only section, but there is a very active Yahoo Fanconi group with a lot of great information. I suggest you log onto that chat list.
My friend who has a Fanconi dog uses Pill Pockets sometimes, and other things other times. My dog only gets thyroid meds but I use cream cheese or ricotta and he takes them easily.
I do very lightly coat all pills with butter so they don't start to dissolve and taste bad, before I use a more liquid treat. I use ice cream as a last resort!
I also vary what I use, sometimes mashed potatoes, peanut butter, hummus, whatever I can hide the pill in that he will eat!
The Basenji companions Web site has a list of things to use for pilling, I think the owner of that list is also the list owner for the Fanconi dog list, she is very experienced.
Good luck to you and Luna, hopefully she will do well on the treatment and have many good years ahead of her.