Paper:

RESUMEN CORTO - SHORT SUMMARY
The objective of this study was to assess the effect of a dry high-protein diet on selected parameters of the renal function in healthy cats.
Ten healthy adult European cats, previously fed with a standard maintenance diet, were fed exclusively with a new dry high-protein diet for 40 months. Both diets met FEDIAF requirements for adult cats. Fasting blood samples were collected at the start of the study (baseline) and then every 2 to 3 months to assess the renal function by measuring urea, creatinine, total protein, albumin, phosphates and symmetric dimethylarginine (SDMA).
Despite some individual minor and temporary changes in usual kidney parameters, mean values remained within the safety physiological ranges. SDMA analyses allowed the detection of some cats with sub-clinic renal dysfunction, but without any evolution throughout the study despite the change in their diet.
These results confirmed that a high-protein content in a complete and balanced diet had no negative impact on the renal function in the long term in healthy adult cats.

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FORTY MONTH-FOLLOW UP OF RENAL FUNCTION IN CATS FED A HIGH-PROTEIN DIET