Hello, you are through to Dr Linda, a UK based vet.
I'm sorry to hear this and appreciate your concern; she's been through a lot recently.
Prescription diets made by Hills and Royal Canin are all a pretty similar price.
So if we want to feed a health orientated, veterinary issued diet, this is the price we need to pay.We can save money by feeding only the dry food and ordering a big bag.
Shop around online, as it is cheaper there than in the shop or clinic.
She should be fed a low fat diet to prevent future pancreatitis so I'd consider Gastrointestinal Low Fat by Royal Canin.
However, we might consider renal disease if her kidney disease is advanced enough, This should be discussed with her vet as those with kidney disease need to have a low phosphorous diet.
I'd avoid a home made diet unless working with a nutritionist as they're almost impossible to get right and nutritional deficiencies are common.