Proteinuria (Excessive Protein in Urine) in Dogs - Page 1
Alright here is a link to one spot that talks about excess protein in the urine.
This result does not rule out or in Liver Issues. Most folks get a full pre op blood work done. what was the Liver results with-in that testing? Has your boy ever had a Bile Acid Test done? - which delineates more finely liver function.
You also did not mention how old your dog is. Is he neutered? If not, ever been bred before? History of kidney and or bladder problems?
So many questions
