Heart Condition
When your dog’s heart is failing to pump enough blood to their organs, especially the lungs, it can cause less oxygen to circulate through the organs and lead your dog to breathe faster. You may notice that your dog has more difficulty breathing when they are lying down rather than when they are sitting up. You will be able to tell if your dog is lacking oxygen by looking at their gums or inside the lower eyelid, both should be pink. If the gums or inner eyelid have a bluish tint, your dog is lacking oxygen.
Pain
When your dog is in pain you will notice them breathing much faster than normal. Dogs will generally hide pain, but they cannot hide the fact that they take short, quick breaths when feeling pain. Check your dog closely for any areas on their body that may be painful. Have your veterinarian perform a physical examination to determine the cause of your dog’s pain.
Allergies
Just like with humans, dogs can suffer from allergies of all kinds. When your dog is allergic to something, they may gasp for air or take short, quick breaths. A serious allergic reaction, such as anaphylactic shock, can cause extreme swelling of the air passages and cause your dog to have difficulty getting oxygen.
Respiratory Infection
Respiratory infection, including pneumonia, can cause your dog to not be able to breathe and pull in enough oxygen into their lungs. You may also notice your dog suffering from coughing, sneezing, lethargy, fever and/or eye and nasal discharge.
Heat Stroke
Dogs that are exposed to high temperatures can suffer from heat stroke. Your dog will try to regulate their breathing by taking short, quick breaths. If you suspect your dog is suffering from heat stroke take them to your veterinarian immediately.
Asthma
Most people do not realize that their dog can suffer from asthma just like humans. Asthma in dogs is caused by an environmental irritant and causes your dog to cough, wheeze and breathe by taking short, quick breaths. Sometimes they will breathe with their mouths open. You will need to get your dog to your veterinarian immediately.