Which of the following is NOT one of the five principles used to control expenses in a veterinary practice?

In veterinary practice management, controlling expenses is crucial for maintaining financial health and ensuring that the practice can provide quality care. The five principles typically used to control expenses include developing a budget, analyzing expenses regularly, and keeping the budget active. These principles emphasize proactive financial oversight and strategic planning to manage costs effectively.

Keeping expenses confidential does not align with these principles because transparency in financial management is essential for making informed decisions and fostering a cooperative environment among staff. Sharing information about expenses can help in identifying areas for cost-saving and encouraging teamwork in implementing budgetary guidelines. Therefore, this principle does not fit within the established framework for expense control in veterinary practices.