Pets that have bronchial asthma are much less constant than feline that have it. What is the reason for Asthma in dogs?Most dogs that have bronchial asthma have it due to the fact that they are allergic to something. They can be allergic to cigarette smoke, perfumes, dirt, or other in air problem. They can cause bronchial asthma in pets. They can lose the appetite2. The dog wheezes4. The canine sneezes6. The veterinarian will certainly give him some blood tests, some breast X-rays as well as he will look for the asthma.