If a dog grunts while sleeping, it may be due to entering a deep sleep or the dog is feeling unwell. When a dog enters a deep sleep, it will appear to be dreaming, which will cause the dog to make a humming sound, and some dogs will even have their hind limbs shaking. At this time, it is recommended that the owner gently strokes the dog and wakes it up. That’s it.

If your dog feels very cold when sleeping at night, he may suddenly grunt. Especially in winter, it is best to keep warm to prevent your dog from catching cold. When a dog is unwell, he or she will grunt and need to consult a doctor in time.