Do Puppies Breathe Fast In Their Sleep. Most dog owners have seen their dog “running in their sleep.” puppies do the same thing. Puppies normally tend to breathe a little fast while they sleep.
All puppies breathe fast when they are resting or sleeping. Why do puppies breathe fast when they sleep? Puppies tend to breathe a lot faster than adult dogs in their sleep, it's completely normal!
They may be concerned about seeing their puppy twitching, paddling and whining during his sleep when he should be just relaxing and catching some zzzs, just like humans do.
When a dog's temperature rises 3 to 4 degrees above their normal body temperature of 100 to 102.5 f, they can develop heat stroke and start to breathe too quickly. With time, your puppy’s rate of breathing will slow down and even out. And as you can guess, this is perfectly normal. Anxiety, stress, fear and different phobias can all cause a dog to breathe faster than normal.