When possible 2 responder ventilation with a bag valve mask is preferred because?

Usually, it is challenging when only 1 responder does bag-valve mask ventilation to the patient as creating an airtight seal while pumping air is not really efficient with not enough experience. 2 responder ventilation alleviates this issue as 1 responder continues to pump air to the patient and 1 responder creates and maintains the airtight seal on the victim. This ensures proper and effective ventilation, especially while chest compressions are being performed by another rescuer.

Smoking damages the respiratory system by inhalation of a foreign substance, that is absorbed and residue is left behind on our lungs sponge like substance. the gas that is inhaled also increase your blood pressure and dilates your blood vessels. also the process of inhaling and exhaling the smoke it causes irritation to the throat and mouth. smoking can cause lung cancer and other respiratory and circulatory diseases. 

It depends,on your dog and the any trap.but i pray that he is fine.