Should I be worried if my dogs urine is discolored?

Question: 

I was walking my dog and during his urination I noticed a brown tint of color. Earlier today he seemed like he had to vomit, but didn't. I was told he has a large prostate gland, could that be the problem?

Answer: 

Urine discoloration and nausea can be clinical signs for a number of medical illnesses, including prostate problems. Other illnesses should also be considered. Please have your pet seen by your veterinarian immediately. He or she will be able to perform an exam and recommend diagnostics that can possibly identify the underlying problem.