Purina says the foods contain adjusted and graded levels of protein and phosphorus to address the delicate balance of providing needed protein in older cats against uraemic toxin production in late phase renal decline.
The current advice is that phosphate should be restricted when the renal patient has confirmed CKD, and IRIS provides therapeutic serum phosphate targets for each stage.
Dr Ellie Groves BA(Hons) VetMB MRCVS, Purina Technical Manager for the UK and Ireland, said: “As obligate carnivores, cats have a high requirement for protein, however, around 20% of senior cats have decreased ability to digest protein, and so are absorbing less protein.
"An inadequate intake of protein leads to loss of lean body mass as muscle is catabolised to meet this need.
"We know that this loss of lean body mass is significantly correlated with an increased risk of mortality.
"But we need to be careful – in renal disease, there is the potential for protein breakdown products to increase in the circulation, acting as toxins.
"So, we need to fine-tune the amount of protein, depending on the stage of chronic renal insufficiency (CRI).
"A dual approach, with Early and Advanced products, allows tailoring of protein levels.”
“Alongside protein, phosphorus content is also tailored to the stage of kidney decline.
"Restricting phosphorus can slow the progression of chronic kidney disease by reducing morphological damage to the kidneys and is thought to be the most important influencer of survival in cats with CKD.
"The levels of phosphorus in the products, are tailored, alongside the protein, to reflect the needs of the cat, with increased restriction when cats are in advanced decline and the kidneys are struggling most.”
NF Renal Function Early Care is available in a dry format (1.5kg) and a pouch (tender pieces with chicken 85g).
NF Renal Function Advanced Care is available in 1.5kg and 5kg packs of dry food, and ‘wet’ options of tender pieces with chicken/ salmon (85g pouches) and a mousse (195g can).
Both diets are now available in veterinary wholesalers.
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