Maintaining a proper seal around the dog’s nose is important because?

Maintaining a proper seal around the dog’s nose is critical for successful K9 CPR because it ensures that rescue breaths effectively enter the dog's respiratory system. During CPR, the goal is to provide oxygen to the dog when its breathing is inadequate or has stopped. A proper seal prevents air from leaking out and maximizes the airflow into the lungs, which is essential for reviving the dog. This can be the difference between life and death in an emergency situation, as effective oxygenation is vital for the dog’s recovery.

Other options do not pertain to the necessity of a seal in terms of emergency care. For instance, the notion of improving sleep or encouraging play does not relate to the immediate life-saving techniques required during CPR or any aspect of respiratory function. Effective air circulation is relevant in a broader context but does not specifically address the importance of seal in the context of resuscitation efforts.