The future of veterinary science is behavior. As we move away from the paternalistic model of "restrain and inject" to the collaborative model of "observe, understand, and train," we unlock better medicine.
A terrified dog or cat requires higher doses of sedation, which increases risk and cost, and creates a cycle of worsening fear. Veterinary science has adopted and Fear Free techniques to break this cycle.
If you are looking for scholarly papers or research articles, these journals are the primary sources for peer-reviewed studies: Animal Behaviour (ScienceDirect)