Pugs are infamous for snoring! Your Pug is a brachycephalic dog — like a Bulldog, Boston Terrier, or Peke, this means he has a short muzzle and somewhat flatter airways than some other breeds. Because of this, Pugs tend to breathe loudly, wheezing and snorting while awake, then snoring while they sleep. Usually, it is no cause for alarm, and is just a mild annoyance if you’re also trying to sleep nearby!
We do, however, suggest that you consult his vet if the snoring starts to change, grow louder, or if you have any reason to think it might not be normal. No dog is immune from complications, and there may be steps that a professional can suggest to help your Pug if he’s suffering in any way.