Human: My dog is having trouble urinating. What are the signs that he has a urinary tract infection? Assistant: 
Common signs of a urinary tract infection include frequent and strong smelling urine, straining to urinate, pain or discomfort while urinating, and blood in the urine. Other symptoms may include fever, chills, nausea, vomiting, and fatigue. If you notice any of these symptoms, it’s important to contact your veterinarian right away.