What is a purpose of using specialized transport cages?

The use of specialized transport cages serves multiple important functions when moving laboratory animals, and ensuring that they fit the opening of cages for safe transportation is particularly crucial. These cages are designed to ensure that animals can be moved securely and efficiently, preventing escape or injury during transit.

In addition to facilitating safe movement, these transport cages also often provide adequate ventilation and secure containment to minimize stress on the animals during transfer. They might incorporate features that enhance the animals' comfort and welfare, such as temperature control and bedding, though the primary focus when discussing transport cages leans heavily on the safety and security aspect.

While features such as continuous feeding and ensuring proper ventilation are important in some contexts, they are not the main focus of specialized transport cages. These cages are primarily constructed with the design to fit securely in transport and allow safe handling, which aligns with the correct answer about their purpose relating to transportation safety.