Symptoms of kidney, bladder and urinary tract disorders:
Urine sample

A vet can examine urine on regular basis with a dipstick and a microscope. A dipstick is a plastic stick that is dipped in urine. It will colour and these colours show the amount of protein, glucose, substances pointing to the break down of fat in the urine and nitrates in urine.

Blood test

A blood test is usually done to judge renal function. The levels of creatinine and ureum express the ability of excreting superfluous and undesired substances from the blood. Creatine is formed in the muscles and transported in the blood. A small part is converted into creatinine which is secreted by the kidneys. Ureum is an amino acid waste product and is also transported in the blood. Kidneys that function properly filter creatinine and ureum out of the blood. A high level of creatinine and ureum states that the filter function of the kidneys is not working well anymore

It has to be said that one must be careful with the level of creatinine and ureum found in blood. Kidneys have a substantial overcapacity. Kidneys are already substantially affected, before high levels of creatinine and ureum show up in blood tests. If high levels are present in the blood, only half of the renal function is intact, or less. Other influential factors on these blood tests are age, weight and gender of the animal.