Here's why:
* Bacteria: UTIs are caused by bacteria that infect the bladder or urethra. These bacteria can produce a chemical called trimethylamine, which has a distinct fishy odor.
* Other possible causes: While UTIs are the most common reason for fishy urine, other factors can also contribute:
* Diet: Certain foods, like fish, can temporarily make your dog's urine smell fishy.
* Medications: Some medications can cause a fishy odor in urine.
* Other medical conditions: Rarely, other medical conditions, like kidney disease, can also cause fishy-smelling urine.
If you notice a fishy odor in your dog's urine, it's important to see your veterinarian immediately. They can perform a urinalysis and other tests to diagnose the cause and recommend appropriate treatment.
Remember: I'm an AI and cannot provide medical advice. This information is for general knowledge and does not substitute professional veterinary care.