Bluebell has half Hills Science Diet T/D and half same brand Furball formula mixed together. She does not have milk at all, and about once a fortnight she has a taste of tinned Fancy Feast Roast Chicken! She only has half a cup of food a day so it is a huge outlay but lasts for ever. She will not even taste anything else. (Oh, I lie. She will delicately lick one little tonguetip of tinned red salmon juice)
I hope you find a solution soon, it must be such a worry.