One of my dogs, Chica, snoring as she sleeps.

https://www.youtube.com/watch?v=BbN1Aw2x8p4

She's a Shih-Tzu, turned 2 last week.
Her snoring was caused by her nostrils being somewhat closed. We had her get surgery for that, so she can breathe more than properly. The snoring, however, has never gone away. She snores like a fricking full grown man, haha.