The Right Diet for Cats with Kidney Disease - The Conscious Cat

Purina NF is the only food my finicky cat will eat and loves.
This is specifically suited for his medical condition (Chronic Renal Failure)
I have tried soft can Kidney diet...

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Hi – my cat has been diagnosed with kidney disease and bladder stones, i am also told he has high calcium levels.
My vet said i should put him on Hills KD, (i found that Purina NF has lower phosphorus though than Hills KD) anyway, I started doing research and found a grain-free natural food, its had 10% protein, (71% meat) its phosphorus levels are however stated as approx ‘0.26%. I contacted the food manufacuturer of this natural food and they say this is better than prescrition food as it will help the kidney regenerate so is better in the long run. The reason i am confused is that, im not sure whether to listen to the vet, or just go with the natural food. Plus i wondered – isnt it important to have a certain amount of potassium? What level of protein is recommended? also – does anyone know of low phosphorus diets in the UK? (as some of these foods mentioned here are from the US)
I would really appreciate some guidance please as I obviously want to be on the right track to help my cat x

Choose the best canned food your cat will enthusiastically consume

Purina Pro Plan Veterinary Diets NF Kidney Function Feline Formula Canned Cat Food .. I noticed my cat was not eating much of her K/D Science Diet food. She has lost several teeth and I think she might have been having trouble chewing it. So I tried Purina instead. It has a flatter shape that seems to be easier for her to chew, and it is slightly softer. She has been eating more and gaining weight. I also had her kidney enzymes tested about a month or two after starting this food, and they were normal, whereas before the food, they had been slightly above normal (hence the special diet). So far, I'm happy with it!

Purina NF - So Disappointed! | The Cat Site

Purina NF is the only food my finicky cat will eat and loves.
This is specifically suited for his medical condition (Chronic Renal Failure)
I have tried soft can Kidney diet foods (Science Diet K/D /turns brown right away upon opening, and Iams Renal/very dry) He hates these and will not eat them without his prescription appetite stimulant. However he will chow down Purina NF happily with no appetite stimulant.

over her disease process by feeding Purina NF canned renal food