I am finding that some people search for the term dog urine yellow. I am not sure what they (you) are looking for but I decided to throw out one possible answer to that search. If you are wondering what makes dog urine yellow it is at least in part the Urochrome. Urochrome is yellow pigment in the urine. The color of the dogs urine will change depending on diet and whether the dog is sick or not. Other factors can also affect it. You can see my post that talks more about the make up of dog urine including why it is yellow.