Handbook of Veterinary Anesthesia, Second Edition, Muir et. al.
"Once considered acceptable, physical restraint, sedation, hypnotics, and inhalation anesthesia are no longer appropriate unless pain is considered and treated. This is particularly true for pain in the perioperative period. Apprehension and stress produced by fear can initiate a variety of potentially deleterious neurohumoral reactions, in addition to sensitizing both the peripheral and central nervous system to noxious stimuli...The optimal treatment of pain is to preempt the establishment of pain and pain hypersensitivity before, during, and after surgery."
Kirk's Current Veterinary Therapy XIII, Bonagura
"Pain management in veterinary medicine has improved significantly since cage confinement alone was an accepted method of pain control. Recent advances in the understanding of the pathophysiology, recognition, and management of pain have underscored the importance of providing adequate pain relief in veterinary patients. It is no longer acceptable to leave a painful animal untreated on the premise that the discomfort will prevent excessive movement and additional injury."
That took me 5 minutes with just the books at home. A literature search is going to come up with a ton of articles saying the exact same thing.
Anyone want to cite some texts or studies showing that animals should be kept in pain? Because I didn't notice any citations on those statements.
It's nice that a previous poster has a knowledgeable breeder for a mother. I don't claim to be the best veterinarian in practice, but I do have a full year of classes in physiology and pharmacology, a semester of anesthesiology, rotations in small and large animal surgery and anesthesia, 10 years + of clinical practice, 20 years + working in the industry in some capacity, and subscriptions to about 5 different journals to keep me updated on the latest research. I think breeders can be amazing sources of information on their breeds, and I would never hesitate to send someone to a good breeder if they're interested in getting a particular kind of dog. But does your average breeder know more than your average veterinarian about physiology? No.