According to Dr. Stanley Coren, Ph.D.,
psychology professor and neuropsychological researcher specializing in dogs, pain that is not treated in dogs can be hazardous to a dogs health.
“The research literature is quite clear in showing that pain, especially if it is experienced over a long duration of time, can actually be hazardous to a dog's health. The reason is that pain is a stressor, and in response to stress the body begins to release a set of stress-related hormones. These affect virtually every system in the body, altering the rate of metabolism, causing neurological responses, causing the heart, thymus glands, adrenal glands and the immune system to go into a high state of activity. If this situation continues long enough these organs may actually become dysfunctional. In addition, the tension that the state of pain related stress induces can decrease the animal's appetite, cause muscle fatigue and tissue breakdown, and also rob the dog of needed, healing, sleep. In the end, the dog is exhausted as well as distressed, and this reduces the body's ability to heal.”
There are many ways veterinarians treat pain depending on where it emanates from, including, laser therapy, acupuncture, physical therapy, massage, IV Fluids and of course PRESCRIPTION PAIN MEDICATIONS.