Have you ever tried her on some raw meat? For a cat a raw mix is solid nutrition - plenty of fat and protein - a mix would contain a balance of muscle meat, bone, offal and skin for fat. Chicken wings, necks or carcasses are great for teeth, if your cat takes to these offcuts then you can move onto a thigh or drumstick which is more meaty. I have some poultry shears that I use to cut up the bones for Noah, then he eats the nutritious marrow. Noah is just greedy (tho he purrs for raw
) but I have heard of fussy and underweight cats really getting their appetite for raw, so fingers crossed!