Hi Brenda,
It seems counterintuitive, but lowering dietary protein lowers the amount lost in the urine. Protein normally isn’t damaging to a kidney but this may be the exception to that rule.
You may want to start by looking at what the protein level is in the diet you are currently using and decrease from there while monitoring UPC. A hint regarding UPC’s: ask your vet about collecting one sample a day for three days in a row then mixing them together and testing to get an average as UPC fluctuate.
