Dogs can breathe when their mouths are tied. Their usual breathing is mainly through their noses. They will only use their mouths to breathe under hypoxic conditions. If your dog is mouth breathing, it may be due to strenuous exercise or the weather is too hot. Of course, it may also be a problem with its cardiopulmonary function.

Tip:

Although dogs mainly breathe through their noses, parents should not tie their mouths casually to prevent accidents.