The progressive increase in calcium oxalate uroliths reported in cats diagnosed with urolithiasis may partly be due to changes in nutrition. Since cats have a predominant mitochondrial alanine:glyoxylate aminotransferase 1 (AGT1) location, high carbohydrate intake may induce endogenous oxalate synthesis. This hypothesis was tested by feeding 12 adult female cats three diets differing in macronutrients: high protein (HP), high carbohydrate (HC) and high fat (HF).
In addition to plasma, urine was collected quantitatively using modified litter boxes. A pilot study with four cats, conducted to determine the adaptation time of urinary oxalate (Uox) excretion to a dietary change, indicated a mean (±SEM) adaptation time of 5.9 ± 0.7 days, with the urinary oxalate:creatinine (Ox:Cr) ratio increasing from 36.1 ± 3.7 to 81.6 ± 2.3 mmol/mol.
In the main study, plasma oxalate concentration was significantly lower when feeding the HP compared to the HF diet, whereas Uox excretion and the urinary Ox:Cr ratio were unaffected by diet. The Uox concentration was significantly lower when feeding the HP compared to the HC and HF diets.
Changes in macronutrient profile may not influence endogenous Uox excretion in cats, but high dietary protein did reduce Uox concentration and may therefore help lower the risk of calcium oxalate formation.
Source: J.C. Dijckera et al., 2012. Changes in dietary macronutrient profile do not appear to affect endogenous urinary oxalate excretion in healthy adult cats. Vet J online May 2012. doi: 10.1016/j.tvjl.2012.03.029
The top 10 petfood manufacturers continue to feel the effects of the global economic meltdown
This book takes a decidedly different turn from the usual consumer-oriented petfood fodder
The maker of raw and holistic diets seeks to help transform pets through its products, philosophy, education and research
The lowly pea appears to be an effective ingredient for the next generation of dog and cat diets
With the availability of quality ingredients declining, perhaps we need to explore this category
5 small steps would streamline information on petfood ingredients to help communicate with pet owners
--- Thank you for your patience ----
If you have any issues logging in or any other need feel free to contact us.