The kidneys are a vital organ in the body of dogs, as well as other mammals, that are responsible for filtering waste products from the blood and regulating the balance of fluids and electrolytes in the body. They are located in the abdominal cavity, towards the back of the body, on either side of the spine.The kidneys are bean-shaped organs that are located deep within the abdominal cavity, and are protected by the rib cage. They are located behind the stomach and intestines, and are located in the area of the lower back, just in front of the lumbar spine. They are also closely related to the spleen, liver and pancreas.In dogs, the kidneys are responsible for several important functions, including filtering waste products from the blood, regulating the balance of fluids and electrolytes in the body, and producing hormones that regulate blood pressure and red blood cell production. They also play a role in the excretion of urine, and are responsible for maintaining the proper balance of water and electrolytes in the body.The kidneys are not typically visible during a physical examination, but they can be felt by a veterinarian if they are enlarged. However, a veterinarian can check the function of the kidneys through blood and urine tests. They can also take x-rays, ultrasound or CT scans to check for any abnormalities or diseases of the kidneys.It's important to note that the kidneys are a vital organ and their proper function is crucial for the overall health and well-being of a dog. Kidney diseases are common in dogs, and early detection is crucial for treating and managing the condition. Regular check-ups and tests with a veterinarian can help detect and prevent kidney problems in dogs.In conclusion, the kidneys are a vital organ in the body of dogs, which are located in the abdominal cavity, towards the back of the body, on either side of the spine. They play a role in filtering waste products from the blood, regulating the balance of fluids and electrolytes in the body, and producing hormones that regulate blood pressure and red blood cell production. They are not typically visible during a physical examination, but veterinarians can check their function through blood and urine tests, and by taking x-rays, ultrasound or CT scans. It's important to note that the kidneys are a vital organ and their proper function is crucial for the overall health and well-being of a dog.