In the grand international chessboard of equine connoisseurship, choosing the right horse transport service holds a crucial importance, akin to a well-orchestrated bishop move. The task is daunting, yet paramount. The process of selecting a competent service involves several nuances that, when handled with adept understanding and care, can ensure a seamless transit for your prized equine.

To begin, it's of utmost importance to have a robust understanding of the horse transport industry, which operates at the intersection of logistics, animal welfare, and legislation. The significance of the industry is manifold, given the increasing cross-border movement of horses driven by equestrian events, breeding, and sales. However, the industry is also mired in complexities, such as regulatory frameworks and the physiological requirements of the animals.

The first step in selecting a reliable horse transport service should be a thorough vetting of their credentials. This includes checking for necessary licenses and certifications. In countries like the United States, the Department of Transportation (DOT) and the Federal Motor Carrier Safety Administration (FMCSA) are the key bodies that regulate and oversee horse transport services. Having an active DOT number and a satisfactory FMCSA safety rating is a testament to the company's adherence to federal laws and regulations.

Secondly, it's important to verify the company's insurance coverage. Equine transporters should have Care, Custody, and Control (CCC) insurance that covers the horses while they're in transit. You would want to make sure that in the unfortunate event of any mishap or accident, the transporter's insurance can cover the loss.

The third factor to consider is the quality of the transport vehicles and equipment. Horses are sentient beings whose welfare is highly influenced by the transport environment. Understanding the vehicle design from the perspective of equine biomechanics and ethology can help in making an informed choice. Ideally, the vehicles should have good ventilation, adequate space, non-slip flooring, and partitions that can prevent the horse from losing balance during transportation.

Next, it's crucial to evaluate the competence of the transport crew. The drivers should have a strong knowledge about horses to be able to identify any signs of distress and to handle the horse calmly and confidently. Evidence of their training and experience, such as the number of years in the service and any specialized training they've had, can be insightful.

The fifth step involves understanding the company's emergency management plans. This includes aspects like emergency contacts, access to veterinary services, vehicle breakdown plans, and weather contingency plans. Having a comprehensive emergency management plan is a hallmark of a professional and reliable horse transport service.

Lastly, references and testimonials can provide a real-world view of the company's reliability. Speaking to previous customers can yield valuable insights into the company's track record and their ability to deliver on their promises.

Now, to the question of why all these factors matter. It's simple: horses are not mere cargo; they are living beings with complex physiological and emotional needs. The process of transportation, if not managed well, can inflict significant stress on the horse, leading to health complications and even fatal outcomes. Additionally, given the high value attached to horses, any mishap or accident during transit can result in significant financial loss. Hence, hiring a reliable horse transport service is a critical decision that requires careful and informed consideration.

From this perspective, horse transport is not just a logistical activity. It's a specialized service that carries an ethical responsibility towards the welfare of the horse and a financial obligation towards the owner. Therefore, hiring a reliable horse transport service is not merely a transactional decision, but a commitment to uphold the highest standards of equine care and welfare.