The necessary reasons for the transportation ban are:
Respiratory problems: The specific nature of their respiratory system makes them vulnerable to difficulties in low-pressure environments and oxygen deficiencies.
Heat stress: Their limited ability to self-regulate their temperature makes them susceptible to overheating, which poses a significant risk in hot weather or during delays.
Medical risks: Obstructive sleep apnea, heart conditions, and other medical issues can exacerbate during long flights.
Airlines impose these restrictions to ensure the health and well-being of animals, as well as to comply with legal regulations regarding transportation.